At the first blush, it seems natural to blame Mr. Herbert Spencer. Every one must feel astonished to find how much he himself knows ofthe Unknowable. The following sentences, however, contain a good account of one amongst his principal explanations of this apparent incongruity. Speaking of Mr. Martineau's conception of the Creator,[135]he writes (Essays, Vol. III. p. 299):—
"Finding, as just shewn, that it leaves the essential mystery unsolved; I do not see that it has an advantage over the doctrine of the Unknowable in its unqualified shape. There cannot, I think, be more than temporary rest in a proximate solution which takes for its basis the ultimately insoluble. Just as thought cannot be prevented from passing beyond Appearance, and trying to conceive the Cause behind; so, following out the interpretation Mr. Martineau offers, thought cannot be prevented from asking what Cause it is which restricts the Cause he assigns. And if we must admit that the question under this eventual form cannot be answered, may we not as well confess that the question under its immediate form cannot be answered? Is it not better candidly to acknowledge the incompetence of our intelligence, rather than to persist in calling that an explanation which does but disguise the inexplicable? Whatever answer each may give to this question, he cannot rightly blame those who, finding in themselves an indestructible consciousness of an ultimate Cause, whence proceed alike what we call the Material Universe and what we call Mind, refrain from affirming anything respecting it; because they find it as inscrutable in nature, as it is inconceivable in extent and duration."
There will be to many people much force in this plea for leaving inscrutables amidst their primary obscurities. But it is open to a rejoinder suggested by Mr. Spencer himself,—you cannot prevent the Mind from inquiring; and, in point of fact, Spencer in person leads the way. He places before us the ultimate idea of a self-existent First Cause. Now surely he might reflect that such an Idea not only permits but invites analysis;—it is no empty abstraction, but a substantive thought and a full one. But he bars analysis to his own satisfaction, by saying that the Idea is in its own Nature inscrutable. Respecting this position two questions arise. First, if inscrutable as to its ultimate nature—its highest essence, and deepest thought,—is it so in its attributes? Next, if Spencer's special walk in philosophy ends with the bare positing of this Idea, mustallPhilosophy do the same? Suppose the Physicist says—"Here I learn to know the Fact of a self-existent universal First Cause," may not the investigator of our Practical human Reason try to discover whether an Ethical view ought or ought not to be taken of this Self-Existent?To answer "No," is either to make physical philosophy thesolephilosophy; or it is to dismember and disjoint the universal Body of Truth into departmental carcase-fragments;—a process which never can begin till all Life has been effectually crushed out of the Whole.[136]For every one who takes wide views of Philosophy;—for every inquirer into First Principles;—above all, if Mr. Spencer will permit us to say so, for every Encyclopædic writer like himself, a question must arise the answer to which it is incumbent on all and each to ascertain, "Can we have any conscious idea whatever of a First Cause without including that very fact of Personality from which Spencer appears to shrink?" Nay we may rather put the point thus: "Is not our idea and definition ofCausalityderived from Personal existence, and apart from this source of derivation, does not the derived idea perish?"—If so, to speak of a non-personal First Cause both of the outside world and of mind itself is to use words to which no thinker can consciously attach any real meaning. There must, says Mr. Spencer, be Power behind Appearance;—in other words, Phenomena imply a Cause behind them,—but to add that this Power or Cause is conceivably impersonal, seems nothing better than to imagine (Hibernicè) at the beginning of the phenomenal chain, apriorphenomenon which in its own nature andex vi verborumcannot account for a Beginning[137]at all;—cannot, to use Mr. Spencer's expression, be "ultimate"; and, in short, requires to be accounted for, itself.
The truth is, that such ideas as First, Ultimate, Power accounting for appearance, or Cause underlying phenomena, cannot be spoken of as altogether Unknowable; because they imply and contain within themselves certain knowable and strongly defined characteristics. Pressed by his critics, Mr. Spencer becomes painfully aware of this truth; and is fearful of being driven by logic and philosophical consistency to plead guilty of believing in a Personal Author of the Universe, and of making Theism the ultimate word of Science. We see on pp. 292 and 302 of Vol. III. how he manifests a preference for the phrase non-relative,viceAbsolute; meaning thereby (if he means anything new) to replace an affirmative idea by a negational abstract, empty enough to land him at once in American Positivism. For,ifthe non-relative meansmorethan to say that he is unable to predicaterelativityof thewholeUniverse of things—if it meansmorethan an avowal of Positivist ignorance—it really does mean a true Absoluteafter all; and very few students of Mr. Spencer will doubt that in the sense of an Absolute (not necessarily Hegelian), this ground idea of his must be accepted.
As courteous antagonists, we will endeavour to abstain from joining with Mr. Sidgwick in the severest censure which has yet befallen Mr. Spencer,—the imputation of a "mazy inconsistency," a "fundamental incoherence," and an "inability to harmonize different lines of thought." We rather wish to congratulate him on presenting such an appearance before the eye of a critic so accomplished, and so equitable; it is a sign that we have not as yet heard Mr. Spencer's final utterance. He is, we are quite sure, divided by a wide tract of thought from the American Positivists;—but we arenotsure that he may not ultimately be found amid the ranks of Scientific Theists. This at the present moment appears the most natural development of the thoughts maintained in his recently published volume. That the nature ofGod, considered as the "ultimate cause of what we call the material universe and what we call mind," is to us at present inscrutable;—that clouds and darkness are round about Him;—that His ways are not as our ways, nor His thoughts as our thoughts, no meditative Theist will deny. But, though the Heavens are higher than the Earth, though beatified spirits worship in humble adoration of the Incomprehensible, yet the measureless distance does not hinder us from knowing Him as a Spirit, and therefore as aPerson; nor yet from confidently affirming that Righteousness and Judgment are the habitation of His throne.
Few passages of Mr. Mill's writings are better worth reading than pages 123, 4, of his "Examination of Sir W. Hamilton's Philosophy." In these pages the eminent writer asserts his own strong moral sentiments, and throws to the winds that inconsistent Utilitarianism with which he had trained his mind to associate them. He will worship no Unknowable Being whose supreme moral nature does not affirm our human morality. "Why is this?" an opponent might fairly ask; "is it not useful so to do? is not such worship conducive to that noblest final end, the interest of mankind?" By saying "No" you affirm two things: one, thedissociationof Religion from Utility; a second, the indivisibleassociationof Religion with absolute Morality.
Some antagonists may consider the first of these two propositions inadmissible, the second objectionable, or at all events, exceedingly doubtful. Every one who maintains that Natural Theology has, in addition to its other elements, a firm and moral ground, will accept with ready assent the second proposition, and will say that the truth or falsehood of the first depends on the meaning attached to an ambiguous word. We are equally sure that "Godliness is profitable for all things," and that "Honesty is the best policy." But then we are quite sure also, that the final cause of Godliness is not profit, nor its essential nature a love of gain; and that policy is not a true description of honesty, nor the being politic the true and proper aim of the honest man. And Mr. Mill, when his moral sentiments asserted themselves, felt these certainties as elements of his inner life. Rather than worship a Being whose unknown moral attributes fell beneath, not the dictates of Utility, but the purest instincts of his own inmost morality, Mr. Mill goes on to declare that he is willing to suffer the horrors of Eternal death.[138]Hell is better than a violation of his own moral nature. Can this be a declaration deduced from the supreme law of Interest,—is it not rather a foundation maxim of independent morality? Violate such foundation maxims, says the independent moralist, and you need not even speak of "Going to hell," hell will come to you. Sooner or later you will find its undying torments within you.
In an article on the death of Mr. Mill, thePall Mall Gazetteexpresses its perception of his leading inconsistency as follows:—
"It is impossible to read Mr. Mill's works with any attention, and in particular to look with intelligence on the later part of his career, without seeing that by temperament he was essentially religious, but that as far as positive doctrine went his mind was an absolute blank. We believe that it was this sharp contrast between theory and feeling which drove him into the schemes for the improvement of the world which have been exposed to so many, and, in some respects, to suchwell-founded objections. Having to love something, and being, as it were, chained down by his own logic to this world and this life, past, present, and future, he struggled to make a sort of religion out of man as he might come to be after centuries or millenniums. Humanity, progress, a realization of all the ideals at which his theories pointed—these were his divinities, for he was a man who could not do without some divinity, and he could find no other. We do not think that his life or his thoughts were triumphant. If he had consistently followed out his own views, if he had carried out his Benthamism with perfect consistency, the result would have been too hard, too grim, too dismal for his eager and sensitive heart. Hence came the faltering, the inconsistency, the romance of his later days. It is a spectacle which may well humble every one who looks on it with intelligence and sympathy. From us, at least, it shall never draw one word of sarcasm, or one thought which is not full of deep respect, regret, and pity. He bore a burden common to many. If he bent under it, it was not because his strength was less, but because his sensibility was greater. When he died one of the tenderest and most passionate hearts that ever set to work an intellect of iron was laid to rest. May he rest in peace, and find, if it be possible, that his knowledge was less complete than he perhaps supposed, and that there was more to be known than was acknowledged in his philosophy." (Pall Mall Gazette, Saturday, May, 10, 1873.)
A little earlier in the same article we find another paragraph worthy of careful consideration:—"No succession of writers ever exercised greater power over the fortunes of this nation, we might say of any nation, than Locke, Hume, Adam Smith, Bentham, and Mr. Mill. What may be described as the theory of modern life has been thought out by them, and translated into its practical equivalents with a persistency, a precision, a degree of method and calmness unequalled in the history of thought. We do not say that their results are complete, but we do say that their teaching has been successful to an unexampled degree; and that, however unpopular it may be with ardent and enthusiastic persons, it is impossible to believe that it could have done what it has done without possessing a very strong hold on human nature."
Viewing this extract by the light of the one before cited, we cannot help asking what side of human nature is it to which the Benthamite doctrines attach themselves? Shall we not regret that the hard, the grim, and the dismal, should characterize our 19th century philosophy? Philosophy that is falsely so called; for the true is "not harsh and crabbed as dull fools suppose."
The text of this Essay and its earlier notes were completed while Mr. Mill was in the ripeness of his powers, and when the present writer never expected to outlive him. Death softens our view of one who has passed away—the bygone life becomes like a moonlighted landscape—asperities hidden in shadow, and a soft radiance poured over each grander eminence. So may it be felt by the critic of every great departed! If, indeed, it prove otherwise with Mr. Mill, the preventing cause will probably be found in certain pages of his published "Autobiography."
The origin of Life is a question that naturally excites much interest, and consequently has been much discussed. It is obviously a problem that presents difficulties of no ordinary kind, and therefore it is by no means astonishing that many theories have been started and statements made which have in turn been quickly contradicted.
It is now known that the whole cycle of phenomena—collectively denoted by the term "Life,"—is manifested by a substance possessing definite physical and chemical properties, and by no other. This substance constitutes the entire organism of the lower forms of life, whether animal or vegetable, and also of the higher in their earliest stage, while from it by various metamorphoses are developed the different histological elements composing the complex tissues of higher animals and plants. Its name Protoplasm is in consequence exceedingly apt, when properly understood.
As to the origin of Protoplasm (or apparent Life) it is clear from a little consideration that two questions may be asked: first, how did Protoplasm arise? and secondly, when once this substance had come into being are we to suppose that from that time to this all Protoplasm has been derived by unbroken descent from the first Protoplasm, or does fresh Protoplasm even now arise in the same way as did the first?—in other words, does the transition from the inorganic to the organic, from what has never lived to what is living, still take place as it must have taken place at some period or another?
To neither of these questions can Physical Science return a perfectly certain and definite answer. And it must be confessed that as far as our knowledge of Nature goes, those have the best of it who maintain first, that all existing Protoplasm implies pre-existing Protoplasm; secondly, that as to the method, the conditions of the real origin ofProtoplasm nothing whatsoever is known; and thirdly, that, notwithstanding all assertions and experiments to the contrary, the origin of living things from dead and decaying organic matter (i.e., matter that has lived), or from inorganic matter under given conditions (spontaneous generation, generatio æquivoca, archebiosis) has never been proved and demonstrated in such a manner as to allow us no room for hesitation, no place for doubt.
The difficulties and dangers besetting this thorny and much-vexed subject will be better understood if we institute a short examination into the history and present condition of the doctrine of Spontaneous Generation.
It is certain from the results of astronomical and geological investigation, that at an exceedingly remote epoch, estimated by untold millions of years, the earth's surface was absolutely unfitted for the presence of life; nay, more, that even the laws of chemical combination were suspended, and in abeyance. After the glowing spheroid cooled down, and various chemical compounds were formed, life as a matter of fact made its appearance on the earth. Throughout the inorganic world the continuity is unbroken—the present is truly the child of the past. But in the organic world it is not so. Whether life arose in the natural course of universal law, or how it did arise, we cannot tell, scientifically, that is to say; no assertion, one way or the other, admits either of proof or disproof. There are absolutely no data to proceed upon. The very first organic remains discovered belong to a comparatively high type. It is as though in a garden every plant and bush burst at once into full flower, and never showed the flower in the bud.
These points are very well put in a passage of Littré:[139]"Jusqu'à ce moment, nous avons cheminé de phénomènes en phénomènes qui se passaient tous sous le régime des lois chimiques et physiques. Leur succession ne présentait aucune solution de continuité; les degrés tenaient l'un à l'autre; et c'est cette déduction qui satisfait l'esprit humain, et qu'il nomme explication. Une fois que l'on reconnait une dissémination première, dans l'espace, d'une matière douée de gravitation et de mouvement, tout en ignorant absolument d'où vient cette matière and d'où procèdent son mouvement et sa dissémination, le reste s'ensuit. Des amas qu'on appelle soleils se forment par condensation; cette condensation développe une immense chaleur; le refroidissement graduel sépare les amas primordiaux en amas secondaires et plus petits qui se meuvent comme lui, se refroidissent comme lui, et représentent nos planètes, nos satellites, et en particuliernotre terre. On a l'univers, on passe au monde, et du monde au globe terrestre.
"Mais là, sur le monde terrestre, un hiatus se présente. Un phénomène nouveau, une force nouvelle apparaît, et la vie se développe en végétalité et animalité. Ce phénomène nouveau, cette force nouvelle, cette vie ne succèdent point par une action continue aux actions continues dont le soleil et la terre sont le théâtre; du moins, en l'état actuel de nos connaissances, la continuité nous échappe. On conçoit, grâce à des faits expérimentaux recueillis de toutes parts et transformés en lois, comment notre globe se refroidit, comment, en se refroidissant, il prend sa forme, comment l'atmosphère, les continents, la mer se constituent; mais on ne conçoit plus comment la vie y parait à un moment donné. Et ce fut bien à un moment donné: pendant des millions de siècles, la terre, vu son incandescence, fut impropre à toute vie. Quand la température y eut baissé au degré compatible avec les existences vivantes, ces existences se montrèrent; mais comment? par quel procédé?
"Il ne faut pourtant pas faire valoir outre mesure cette discontinuité. Une discontinuité, autre que celle qui appartient à l'apparition de la vie, est survenue dans le cours du développement de la terre. Quand les particules qui la composent, étaient animées d'une immense chaleur, une dissociation complète y régnait; elles n'obéissaient qu'aux lois du mouvement, de la gravitation, de la chaleur et de la lumière; les lois chimiques, c'est-à-dire de combinaison et de décombinaison, n'y étaient qu'à l'état virtuel. Elles passèrent à l'état effectif, dès que l'abaissement de la température le permit. Je sais bien qu'une différence considérable existe entre ces deux discontinuités: en effet, depuis lors, il a toujours été possible de reproduire à volonté les faits chimiques; et, toutes les fois que nous en avons besoin, nous répétons le phénomène d'origine qui se produisit dans les combinaisons et décombinaisons. Pour la vie, c'est autre chose; elle a été une fois émise, et, depuis le phénomène d'origine, elle ne se propage que par génération. Un être vivant est necessaire pour produire un être vivant; et, ni par les procédés de la nature, ni par ceux de la science, ce qui se fit au moment créateur ne se refait. Malgré cette considérable différence, il demeure que la terre a possédé des forces virtuelles qui sont entrées en action, quand les conditions générales, se modifiant graduellement, l'ont permis."
A little further on he continues:—"Au point de vue d'origine, on abandonnera la question comme toutes les questions qui impliquent une cause première. La philosophie positive s'exprime là-dessus comme elle s'exprime touchant toutes les choses hyperphysiques, c'est-à-direplacées au delà de l'expérience. Quand elle entend les matérialistes prononcer que la vie est le résultat des forces physiques et chimiques dont on connaît l'action, elle refuse d'accepter une solution qui dépasse les prémisses. Mais elle n'écarte pas la solution matérialiste au profit de la solution théologique; l'intervention d'un Dieu créateur est également invérifiable par l'expérience, et, partant, atteinte de la même fin de non-recevoir. Maintenant, si on demande à la philosophie positive quelle est, à elle, sa solution entre la génération matérialiste et la création surnaturelle, elle répond qu'elle n'a aucune solution à proposer, que rien ne peut la forcer à croire ce qui n'est pas démontré, et qu'elle accepte, avec autant de fermeté que d'humilité, une ignorance invincible sur tout ce qui est indemontrable."
In the first passage certain salient points are strikingly brought out, above all the vast difference between the worlds organic and inorganic; but, next, how much soever a Positivist may be pleased to believe only that which admits of phenomenal verification, it is not every one, especially if given to thought, who would willingly endorse the second paragraph. If we know only what we can verify, many beliefs must needs be abandoned, and amongst them some which have received the almost universal assent of mankind. Knowledge (in the sense of verifiable knowledge) and Belief may appear two widely different things; but it should never be forgotten that we often accept the one as surely as the other.
The ancients held that living things arose from the earth at any time, engendered by the warmth of the sun and moisture. Absurd as it may seem, the belief that blue-bottle flies, etc., were a natural result of the decay of meat and other organic matter obtained credence even in comparatively modern times. Redi, an eminent Italian, first demonstrated experimentally the falsehood of this doctrine, and for some time the hypothesis of spontaneous generation appeared to have received a death-blow. And by degrees the conviction that every living thing proceeded from a germ gained strength, and was confirmed by the rapidly extending use of the microscope. Yet in the eighteenth century certain experiments of Needham seemed to establish the fact that in boiled infusions where presumably all germs were destroyed, small Infusoria made their appearance even when means were taken to exclude the entrance of fresh germs. Buffon lent the authority of his great name. These experiments were repeated by the Abbé Spallanzani, who showed by more careful methods the fallacy of the conclusions drawn. A passage in Sir B. Brodie[140]which alludes to these facts may be worth quoting:—
"Crites. Then am I to understand that you would reject altogether the hypothesis of equivocal generation, which supposes that under certain circumstances, even at the present time, particles of inorganic matter are brought together, and so united as to become endowed with organization and life?
"Eubulus. The question is one of great interest, and I will refer you to Ergates for an answer, knowing at the same time pretty well what that answer will be.
"Ergates. Of course Crites refers to the production of those minute creatures, known by the name ofInfusoria, in the experiments of Walter Needham, and some others.
"It is true that in these experiments certain vegetable and animal infusions, after no very long period of time, when examined by the microscope, are found to contain a multitude of minute creatures, of various forms, exhibiting signs of spontaneous motion, and multiplying their species in the usual manner. Some of these are even of a complicated structure, much beyond what might,à priori, be expected as the result of the first attempt of inorganic matter to enter into the realms of organic life. The subject has been so frequently discussed, that I need not trouble you with the details of the arguments which have led the most eminent naturalists to believe that these creatures are not really spontaneously engendered, but that they are derived from minute ova which are present in the air, and which, when placed under circumstances favourable to their development, burst into life: in the same way as the egg undergoes those changes which convert its contents into a bird, when placed under the influence of the animal heat of the parent. But even if this view of the matter be not correct, the case is not really altered; for, after all, theInfusoriaare never detected except in vegetable and animal infusions, which necessarily presuppose the existence of organic life."
But it is one thing to demolish the theory and statements of an antagonist, and another to erect a structure in their place. However completely Spallanzani had demonstrated the faults and untrustworthiness of Needham's results, he had not established the opposite doctrine, and to many it seemed that the very conditions under which his experimentation was conducted, were sufficient to prevent the development of life. But the work begun by Schulze and Schwann and ended by Pasteur apparently has supplied what was wanting in Spallanzani's researches. The evidence is thus admirably summed by Professor Huxley:[141]—
"It is demonstrable, that a fluid eminently fit for the developmentof the lowest forms of life, but which contains neither germs, nor any protein compound, gives rise to living things in great abundance, if it is exposed to ordinary air; while no such development takes place, if the air with which it is in contact is mechanically freed from the solid particles, which ordinarily float in it and which maybe made visible by appropriate means.
"It is demonstrable, that the great majority of these particles are destructible by heat, and that some of them are germs, or living particles, capable of giving rise to the same forms of life as those which appear when the fluid is exposed to unpurified air.
"It is demonstrable, that inoculation of the experimental fluid with a drop of liquid known to contain living particles, gives rise to the same phenomena as exposure to unpurified air.
"And it is further certain that these living particles are so minute that the assumption of their suspension in ordinary air presents not the slightest difficulty. On the contrary, considering their lightness and the wide diffusion of the organisms which produce them, it is impossible to conceive that they should not be suspended in the atmosphere in myriads."
The experimental means by which these facts are proved may be briefly stated:—
I. The air contains solid particles. Professor Tyndall has shown, as all who have read "Dust and Disease" know to their own discomfort, that the purest common air, when submitted to a beam of electric light, renders the track of that beam visible. Ergo, it must contain solid particles capable of scattering light.
II. These particles are mostly destructible by heat, or may be mechanically strained off. He has shown this by the fact that common air which has passed through a red-hot tube, or through a filter of cotton-wool, will no longer render the track of the electric beam visible.
III. Many of these particles are germs. Schulze and Schwann proved that when air is passed through red-hot tubes, then through a fluid which is capable of affording a nidus to the germs, if present, no development of life takes place. Similarly Schrœder established the same fact by using a strainer of cotton-wool. Further, Pasteur gave an additional proof by microscopical examination, as well as by a direct experiment. He passed air through gun-cotton, dissolved this in ether; and in the collodion germs were clearly recognizable. Also he plunged a piece of cotton-wool through which air had been strained into an experimental fluid. This fluid soon swarmed with forms of life.
IV. The experimental fluid may be inoculated by simple exposure to air as well as by any fluids known to contain living forms;e.g., if the fluid be placed in an open vessel, living forms soon make their appearance. Yet supposing the aperture of the vessel, instead of pointing vertically upwards, be turned obliquely or downwards, the fluid will remain clear for an indefinite time. Similarly a drop of an infusion containing living forms added to the experimental fluid soon causes it to swarm with life. The forms that appear are the same in either case.
V. The experimental fluid cannot give rise itself to these forms. It is known as Pasteur's solution, and consists of water, ammonium, tartrate, sugar, and yeast ash. Hence there is no organic matter in it. If proper care be taken, it may be kept for an indefinite time.
VI. The germs are so minute that in many cases, even when known to be present, they are scarcely visible to the highest microscopic powers. They must be universally diffused, as any organic infusion left exposed soon swarms with the forms to which they give rise.
Such an array of facts, proved experimentally over and over again, must convince the most tenacious sceptic, and he may feel inclined to agree with the opinion expressed in the following passage from Sir B. Brodie:[142]—
"Crites. Then, if I understand you rightly, you have arrived at these conclusions. First, that there was a time when this earth was not in a fit state for the maintenance of either animal or vegetable life. Secondly, that in its present condition there is no evidence of any law being in operation which would account for any living beings being called into existence except as the offspring of other living beings which previously existed; and that from these premises we cannot fail to arrive at this further conclusion, that the first introduction of life on earth must have been by some special act of the creative power, of which we have no experience at present.
"Eubulus. I suspect that this, really and truly, is all we actually know on the subject."
Notwithstanding this apparently irresistible amount of evidence, the question of abiogenesis has recently been revived by Dr. C. Bastian in a well-known book, "The Beginnings of Life." Dr. Bastian believes that he has demonstrated the origin of living organisms from organic infusions as well as from solutions of salts containing no organic matter: nay, even more wonderful facts than these which it is unnecessary to specify. His experiments are so numerous, his assertions and figures so clear and definite, and his reputation forprevious good scientific work once so high, that the book has caused no small stir and discussion. Could Dr. Bastian's facts be only established, they would inevitably revolutionize the whole science of Biology.
However, the same fate which has overtaken his predecessors has befallen Dr. Bastian himself. A nearly universal verdict of "Not proven" has been returned: and not only is the accuracy of his experimentation denied, but even worse accusations have been brought. To enter into details of his experiments would require too much space, but it may not be uninteresting to detail some of the peculiarities and difficulties which attend on the investigation of such a subject as Spontaneous Generation.
At the very threshold of the inquiry stands a grand difficulty. Strange as it may seem, it is nevertheless true, that notwithstanding the many years, the immense labour bestowed by illustrious men on this subject, next to nothing is known of the relations existing between the lowest forms of life, animal or vegetable (especially the latter), as well as their germs, and varying physical and chemical conditions. Heat, light, cold and darkness, alkalies and acids with other chemical compounds, one would imagine to be not without their influence. Yet what this influence may be in a given case, none can tell. Enough is known in the way of a few detached facts to make it certain that these agents have very decided effects. It might be thought that any one who wished to attack the problem of Spontaneous Generation anew would first try to obtain some connected knowledge on this point. Indeed, until it has been cleared up somewhat, it is not very evident what good Experimentation on Heterogenesis can do. It is much as if a chemist were to throw a handful of stuff (what he knew not) into a crucible, and then expect a valuable result. It can scarcely be doubted that many of these lower organisms live and grow under conditions whichà priorimight seem incompatible with vitality.
It is clear also that the work of one experimenter ought to be such as may admit of repetition by another with the same result. Now no one who attempts the study of this subject of Spontaneous Generation, can fail to be struck with the immense mass of conflicting evidence. Some mischievous spirit appears to have purposely thrown confusion over the whole. Facts are alternately stated and denied. It is very hard to be sure of the right road, even for an experienced person.
Another point relates to the value of the evidence when obtained. It can scarcely be doubted that out of a given number of experimentsundertaken to establish a case of Heterogenesis or Archebiosis, great value should be attached to the negative evidence afforded by those that disprove the supposed fact. A little consideration will show the reason. The precautions to be taken against the intrusion of germs are innumerable: a slight exposure to the air, accidental contact of an unheated rod or tube, or neglect of some other particulars may inoculate the experimental fluid. Hence even with care the chances are many in favour of some such accidental intrusion, and great caution should always be exercised before an affirmative result can be regarded as firmly established.
And further there is the experimentalist himself to be taken into account. The task requires an intimate knowledge of many minute organisms, and the different forms they assume; an acquaintance, wide and accurate, with various experimental methods; a clear view of the end and the various precautions required to attain that end; a mind ready to contrive, prone to doubt and to hesitate, rather than to be convinced. Men vary much in the amount of what is scientifically termed their personal equation, and one difficulty in accepting the results of a piece of work is the danger of misplaced confidence.
As was said before, Dr. Bastian's attempt to demonstrate the reality of Spontaneous Generation has been a failure. His experiments have been repeated, and failed to give the like results in the hands of competent men. Witness the following quotation from a careful review of his book in the Microscopical Journal.[143]It relates to the now celebrated cheese and turnip solution.
"Nevertheless in consequence of the interest which Dr. Bastian's work has excited, we have made the experiment (and that repeatedly) as directed by him. This is not the occasion on which to give the details of the experiments in question. It will, however, perhaps add some value to the remarks which it has been our duty to make when we state that, carefully following Dr. Bastian's directions, using at the same time great care as to cleanliness and due boiling, we have obtained results whichin every single instance, out of more than forty tubes closed on four separate occasions, simply contradict Dr. Bastian. We believe, then, that Dr. Bastian's last dogma in archebiosis,—his belief in turnip solution with a fragment of cheese—must be placed in the same category as his colloidal urea, his spontaneously generated bog-moss, his fungi born in crystals, his unmistakable processes of heterogenesis, and his 'watching' and 'experimentation' in general."
The reviewer proceeds to question whether Dr. Bastian has even the knowledge requisite for so delicate an investigation. It would besupposed that he was intimately acquainted with various microscopical structures; but we read,[144]"Professor Huxley gives a contribution towards the determination of the personal value in Dr. Bastian's researches. 'He (Dr. Bastian) will recollect that he wrote to me asking permission to bring for my examination certain preparations of organic structures, which he declared he had clear and positive evidence to prove to have been developed in his closed and digested tubes. Dr. Bastian will remember that when the first of these wonderful specimens was put under my microscope I told him at once that it was nothing but a fragment of the leaf of the common bog-moss (Sphagnum), and he will recollect that I had to fetch Schacht's book "Die Pflanzenzelle" and show him a figure which fitted very well with what we had under the microscope before I could get him to listen to my suggestion, and that only actual comparison with Sphagnum, after he had left my house, forced him to admit the astounding blunder which he had made.'
"Of these three pieces of evidence, the last is the most important, for, whilst it places us on our guard with regard to Dr. Bastian's accuracy generally, it at the same time furnishes a key to the explanation of a number of his experiments in which, according to that precipitate discoverer, 'organisms' were found on opening tubes containing infusions which had been boiled and sealed hermetically."
How then are we to sum up the case? for or against Dr. Bastian? Can any thoughtful person admit the conclusions of one apparently so unfit for his task? The best answer is in the words of his Reviewer.[145]
"Briefly it is to be said that the chapters in this book on heterogenesis, contain a reckless attempt to revolutionize biological doctrine without a single demonstration of fact to justify it, even if it be admitted that the observations and drawings cited are accurate. Revolution in science as in politics can only be justified by success—a wanton attempt in either sphere must deserve the severest condemnation. Dr. Bastian by his exhibition of himself in dealing with heterogenesis writes himself down as incapable—as inadmissible in the character of a witness in a scientific investigation. The Sphagnum delusion is now explained, for it becomes evident that we have to deal with an individual with whom such delusions are no rare exceptions.
"We should indeed be sorry to believe that Dr. Bastian is himself aware of the injury which he is doing to the cause of science, by promulgating these rash assertions as to the beginnings and changes of living things; we altogether decline to entertain the notion that he is himself conscious of the baselessness and flimsy character of hisstartling discoveries, and is nevertheless willing at the expense of injury to the cause of intellectual progress, to obtain for himself a temporary notoriety. On the contrary, we believe that he is under the influence of a delusion, similar to those which from time to time obtain notoriety in the case of 'spiritualists,' 'circle-squarers,' and such victims of belief in the marvellous. The origin and mode of growth of such delusions form a very interesting psychological study, and it is only when we have obtained a proper conception of Dr. Bastian as an abnormal psychological phenomenon that we can hope rightly to appreciate the whole of the statements made in his book.
"Delusion and self-deception are much commoner than the world is generally accustomed to consider them. In a very well-known and often quoted remark we have a recognition of the wide-spread occurrence of delusions and an attempt to explain their origin; the saying to which we allude is, 'The wish was father to the thought.' There cannot be the least doubt that men are unconsciously hindered or misdirected in their estimate of fact by previously formed desires. Such a desire acts on the mind like the suggestion of the mesmerist to an individual who has allowed himself to be brought into the hypnotic condition. In this way many misconceptions and strange contradictions of testimony are to be explained."
The importance of the subject is sufficient apology for so long a quotation. But our quotations allow us to draw one conclusion; that so far as Spontaneous Generation is concerned human knowledge is exactlyin statu quo. Up to this time there is no evidence, worth consideration, that establishes a single good case of heterogenesis; nay, rather all evidence points to the conclusion that Protoplasm is invariably derived from pre-existing Protoplasm, at least under existing conditions. Then too there is no fact known which enables us to say how Protoplasm arose in the first instance. On this point we are in the darkness of complete scientific ignorance. The whole discussion may be well closed by a striking passage from Professor Huxley's before quoted address.[146]
"But though I cannot express this conviction of mine too strongly, I must carefully guard myself against the supposition that I intend to suggest that no such thing as abiogenesis ever has taken place in the past, or ever will take place in the future. With organic chemistry, molecular physics, and physiology yet in their infancy, and every day making prodigious strides, I think it would be the height of presumption for any man to say that the conditions under which matter assumes the properties we call 'vital' may not, some day, be artificiallybrought together. All I feel justified in affirming is, that I see no reason for believing that the feat has been performed yet.
"And, looking back through the prodigious vista of the past, I find no record of the commencement of life, and therefore I am devoid of any means of forming a definite conclusion as to the conditions of its appearance. Belief, in the scientific sense of the word, is a serious matter, and needs strong foundations. To say, therefore, in the admitted absence of evidence, that I have any belief as to the mode in which the existing forms of life have originated, would be using words in a wrong sense. But expectation is permissible where belief is not; and if it were given me to look beyond the abyss of geologically recorded time to the still more remote period when the earth was passing through physical and chemical conditions, which it can no more see again than a man can recal his infancy, I should expect to be a witness of the evolution of living protoplasm from not living matter. I should expect to see it appear under forms of great simplicity, endowed, like existing Fungi, with the power of determining the formation of new protoplasm from such matters as ammonium carbonates, oxalates and tartrates, alkaline and earthy phosphates, and water, without the aid of light. That is the expectation to which analogical reasoning leads me; but I beg you once more to recollect that I have no right to call my opinion anything but an act of philosophical faith."
Obviously, as Professor Huxley points out, between philosophical faith and philosophical knowledge there is a chasm to be bridged over. But should the hypothesis ever be verified, it would make no difference to the reasonings of the Natural Theologian—since the concurrence of conditions necessary for the production of the phænomenon would manifestly ensue upon some definite though recondite law, at present beyond our ken.
The ambiguities attaching to this term were mentioned in a foot-note on our very first page. Since that note was written, the tendency of scientific men has been to increase the number of hypotheses respecting the nature and laws of the material world, and by consequence to multiply the shades of signification conveyed by the word Materialism.
So long as such distinctions are confined to the territory of pure science, whether that of the Physicist or of the Biologist, they do notin themselves affect the religious (or ethico-religious) position of any thinker; and need not, therefore, occasion any trouble to the Natural Theologian. But it is worth while to observe how rashly, on account of some such scientific discussion, a writer is said to be a Materialist or no Materialist, by persons who (understanding little or nothing of science themselves) drag the unhappy author outside the pale of his own domain, and affix to him some religious or irreligious epithet which he has neither desired nor deserved.
The philosophic idealist often escapes; he is pronounced "no Materialist," because he doubts the substantive existence of Matter, yet he may and often does hold that the ideal thing he calls his soul, has a life inextricably bound up with that other ideal thing he calls his body, and must perish with it, never to live again.
We may add the useful remark that so far as Ethico-religious Materialism is concerned it is much more easily tested by the Doctrine of Soul than the Doctrine of Body. For example, consistent Materializers will always maintain that the reasoning human soul differs from the animal soul of brutes, not in quality, but in quantity. Dr. L. Büchner (sometimes called a "crass Materialist") makes this assertion repeatedly, and explains it by adding—"Man has no absolute advantage above the animal; his mental superiority being merely relative. There is not one intellectual faculty which belongs to manexclusively; his superiority is merely the result of the greater intensity, and the proper combination, of his capacities. The enlarged human faculties are, as we have already seen, the natural and necessary result of the higher and more perfect development of his material organ of thought."[147]
Turning to a more refined species of Materialism, we find a similar value always placed on the dogma that whatever differences exist between man and brute, they amount to a distinction not of kind, but only of degree. The consequences hence deduced are of the very greatest importance, and they run much as follows. No one will venture to assert that the power of what has been hastily called Volition is, or can be, an endowment of mere animal nature. We do not lay upon the tiger (as we do popularly lay upon the tyrant) a moral responsibility on account of his savage appetites. Their indulgence does not flow from any reasoning faculty of Will. His cruelty is the movement of automatic instincts, governed by laws like those which rule over the inanimate world; more complicated probably, but no-ways different in their essence. The fall of a stone, and the spring of a tiger, are both consequences of determining laws inherent in their several modes of existence, and moving both as machinery is moved by a steam engine. Now, a difference in degree only, argues no difference in those essential laws which rule equally the greater andthe less. The giant and the dwarf are alike subject to the same laws of body and mind; and man is (as we have seen) but a mentally taller brute. The tyrant, therefore, resembles the tiger; the human animal is moved as the other animals are moved, and, like them, is subject to the determining law, just as the lifeless world is so subjected. In plain words, then, this human machine is moved like other machines. What we call Reason, spontaneity, volition, are, when analysed, no exceptions to the law-governed mechanism of the world we live in. Our motives make us, not we our motives. The faculty we exercise under the name of Choice, is really neither more nor less than a determined, unalterable, impulsion; the result of a mechanical law. And this law has formed and now constitutes the Universe.[148]
Refined Materialism proceeds to ask in the next place, what more do we know of Matter than its rigid undeviating reign of Law?—The great Globe itself obeys the same Laws as the falling stone: they pervade and direct the mechanism of the starry heavens. Life does not exempt either vegetable or animal from the same rule of law. We have just seen that Mankind isnotso made to differ, as to permit a plea of exemption from the same empire. Ascend from Protoplasm to the highest human intelligence,—one heritage devolves through brute to man. The same mechanical law accounts for the "Psychogeny" of both. Mechanical Law, in its ramifications, is (as has been said) all we really know of Matter. It now turns out that all Mind has been developed by this same ever-ramifying law; may be analyzed back into its elements; is most truly expressed by its symbols; and can never be exempted from its determinations. Mind, therefore, and Matter are resolvable into this sole unity—the Law of ultimate mechanical movement and impulsion.
We have called this system a refined Materialism; but another name for one of its most influential shapes has appeared and made considerable progress, particularly on the continent of Europe. This name is Monism; and is intended to declare that every other belief must be at best a Dualism.[149]
What then is the true human meaning of this Monistic creed? Our souls (if we have souls), possess the image, not of Absolute Being and Personality, but of abstract Fate, and rayless, eyeless Necessity. We live machines; those supposed moralities we commonlymiscall our Volitions, spring out from beneath the moving wheels. We die, as machines go to pieces when the wheels get out of gear; and no other account need be asked of the broken clock-work. Here lies a man, close beside him moulders a dog. They are now what they always were,—copartners in the same inexorable destiny.
Inexorable:—yes; for, standing beside these two graves, we see where our higher Philosophy and our religious hopes alike lie buried. What is Mechanical Law to us? The antithesis of Providence; therefore, with the edict which proclaims its sway, all our prayers are ended. And what is Man, compared with the equal dog who bears him company? One event befals them both; yet we may ask whether before or after that one event, Man has or can have any preeminence above the beast? Let him be spoken of as statesman, warrior, orator, poet, painter, sculptor, musician; none of these epithets convey any truth. He may possibly be a speaking, striking, weaving, drawing, colouring, sound-producing machine. But the Designer of the Universe and the human artist have disappeared together. What we took for the author of immortal works, an original genius, an inspired hero of his kind, "a man and a leader of men," was a piece of wheel-work driven by unalterable law. There was the same "must be" to him as to his dog. There never was and never could have been, nor yet ever will be anyessentialdifference; two spirits are gone downwards to the earth.
Man has not even the sad preeminence of Sin. Where can he find or make room for wrong-doing, when impelling Mechanism determines all? And where Sin is not, Repentance cannot come.
Hope is shut out along with Remorse and its unmeaning pains. Man has no ladder of ascent left him; and why should he wish to climb? If there were such a ladder as Jacob dreamed, its base must rest on lifeless Law, and at its summit there would only be this same Law, enthroned and Deified.
Thus, when the primæval Nebula arose in Space (how or why itarose is not told us), its vapoury Law contained all that is, and all that can be:—Plato and Shakespeare, Moses and St. John glimmered in its tremulous twilight. Worlds inanimate and animate scintillated from its fires. What we call Heaven and Earth are its dumb children, its law-determined Evolutions. Thou and I, O reader, have harboured strange fancies;—let them go;—we are but parts of the Whole; and the Whole is a mechanical Unity. Now that we find ourselves disabused and illuminated, our great difficulty may perhaps be to fall down, Strauss-like, and worship thisUniversum. Can such worship, or such an object of worship, bless and satisfy our high aspiring race? Eyes that have watched for Righteousness, hearts that have yearned after it, let the answer come from you! In this answer lives or dies the twofold belief of the Natural Theologian, the twofold hope resulting to Mankind. The belief, that is to say, in a personal Immortality, the belief in a personal God.
It may now seem plain that the readiest test of moral or religious Materialism is its doctrine, not of Body but of Soul. There is no charm in such a word as Matter to differentiate the character of a philosophy. Looking at the material world, any thinker may be a Natural Realist or a Pure Idealist; yet being either or neither, he may materialize, or the reverse, so far as Morals and Religion are concerned. The simple question ought rather to be; Is man mechanically governed by the Law which rules the world of Abiology (the lifeless inorganic world), or is he, can he become, a Law unto himself?[150]
It would be unfair to omit impressing upon the reader's mind that physical scienceper seis by no means answerable for ethico-religious Materialism. As a question of fact, it does not seem established that students of Nature, whether physicists or biologists, have, as such, been the chief offenders. On the contrary, for every single instance of the kind, it seems quite probable that at leasttwometaphysical writers might be found guilty. Obviously, some such large proportion may reasonably be expected, when we consider that Determinism, (the word Mill and others prefer to Necessity), is a theory involving a certain kind of metaphysics.
But the really largest crop of materializers arises from a Debateable Land. There is a hybrid class of "thinkers," concerning whom the best physical-science authorities allege that "such nebulous rascals are mere metaphysicians," while metaphysical speculators, pure and simple, feel quite sure that "though under a cloud, the gentlemen must be Physicists."[151]
So far as Biology[152]is concerned, let the reader compare Mr. HerbertSpencer's latest utterances already referred to, (inEssays, Vol. III.sub. fin., especially pp. 249-50), with the following passages from Mr. Huxley. "I suppose if there be an 'iron' law, it is that of gravitation; and if there be a physical necessity, it is that a stone, unsupported, must fall to the ground. But what is all we really know and can know about the latter phenomenon? Simply, that, in all human experience, stones have fallen to the ground under these conditions; that we have not the smallest reason for believing that any stone so circumstanced will not fall to the ground; and that we have, on the contrary, every reason to believe that it will so fall. It is very convenient to indicate that all the conditions of belief have been fulfilled in this case, by calling the statement that unsupported stones will fall to the ground, 'a law of nature.' But when, as commonly happens, we changewillintomust, we introduce an idea of necessity which most assuredly does not lie in the observed facts, and has no warranty that I can discover elsewhere. For my part, I utterly repudiate and anathematize the intruder. Fact I know; and Law I know; but what is this Necessity, save an empty shadow of my own mind's throwing? But if it is certain that we can have no knowledge of the nature of either matter or spirit, and that the notion of necessity is something illegitimately thrust into the perfectly legitimate conception of law, the materialistic position that there is nothing in the world but matter, force, and necessity, is as utterly devoid of justification as the most baseless of theological dogmas." ("On the Physical Basis of Life,"Lay Sermons, pp. 157-8.)
And again (pp. 159-60):—
"We live in a world which is full of misery and ignorance, and theplain duty of each and all of us is to try to make the little corner he can influence somewhat less miserable and somewhat less ignorant than it was before he entered it. To do this effectually it is necessary to be fully possessed of only two beliefs: the first, that the order of nature is ascertainable by our faculties to an extent which is practically unlimited; the second, that our volition counts for something as a condition of the course of events.
"Each of these beliefs can be verified experimentally, as often as we like to try. Each, therefore, stands upon the strongest foundation upon which any belief can rest, and forms one of our highest truths. If we find that the ascertainment of the order of nature is facilitated by using one terminology, or one set of symbols, rather than another, it is our clear duty to use the former; and no harm can accrue, so long as we bear in mind, that we are dealing merely with terms and symbols."
Symbols, are to the true philosopher like old-fashioned copper "tokens," privately impressed with letters and devices, but lacking the Royal image and superscription. They are, as Spencer and Huxley agree, "unknown quantities;"—relativities not entities. They are employable enough where they suit,[153]provided Mr. Huxley'scaveat(p. 161) is steadily kept in mind. "The errors of systematic materialism may paralyze the energies and destroy the beauty of a life."
The reader may be pleased to put the subject of Materialism before himself in a compendious shape as follows:—If the question asked be, "Whatis Matter?" the answer appears little likely to be of moment to morals or Natural Theology, except so far as human ignorance is made a plea for Scepticism. But, if it is inquired, "whether theMechanicalLaws of Matter are the laws of Universal Nature, including human nature? the issue becomes most momentous. The reply made, answers another question of the deepest interest:—"Are there any conditions under which a Science of Natural Theology is possible?" If Mechanism be the law of the Universe, Natural Theology is plainly impossible.
BELIEFS OF REASON.
"While we indulge to theSensitiveorPlantalLife, our delights are common to us with the creaturesbelowus: and 'tis likely, they exceed us as much in them, as in the senses their subjects; and that's a poor happiness for Man to aim at, in which Beasts are his Superiours. But those Mercurial spirits which were only lent the Earth to shew Men their folly in admiring it; possess delights of a nobler make and nature, which as it were antedateImmortality; and, at an humble distance, resemble the joyes of the world ofLightandGlory. TheSunandStars, are not the world'sEyes, butThese: theCelestial Arguscannot glory in such an universal view. These out-travel theirs, and theirMonarch'sbeams: passing intoVortexesbeyond their Light and Influence; and with an easie twinkle of an Intellectual Eye look into theCentre, which is obscur'd from the upper Luminaries. This is somewhat like the Image ofOmnipresence. And what theHermetical Philosophysaith ofGod, is in a sense verifiable of the thusennobled soul, Thatits Centre is every where, but its circumference no where....
" ... And yet there's an higher degree, to whichPhilosophysublimes us. For, as it teacheth a generous contempt of what the grovelling desires ofcreepingMortals Idolize and dote on: so it raiseth us to love and admire an Object, that is as much above terrestrial, asInfinitecan make it. IfPlutarchmay have credit, the observation of Nature's Harmony in theCelestial Motionswas one of the first inducements to the belief ofa God. And a greater then he affirms, that the visible things of the Creation declare him, that made them. What knowledge we have of them, we have in a sense of their Authour. His face cannot be beheld by Creature-Opticks, without the allay of a reflexion; and Nature is one of those mirrors, that represents him to us. And now, the more we know of him the more we love him, the more we are like him, the more we admire him. 'Tis here thatknowledge wonders; and there's anAdmiration, that's not theDaughterofIgnorance. This indeed stupidly gazeth at the unwontedeffect. But the Philosophical passion truly admires and adores the supremeEfficient....
".... And from this last article, I think I may conclude the charge, which hot-brained folly layes in againstPhilosophy; that it leads toIrreligion, frivolous and vain. I dare say, next after the divineWord, it's one of the best friends toPiety. Neither is it any more justly accountable for the impious irregularities of some, that have paid an homage to its shrine; than Religion itself for the extravagancies bothopinionativeandpractickof high pretenders to it. It is a vulgar conceit, thatPhilosophyholds a confederacy withAtheismitself, but mostinjurious: for nothing can better antidote us against it: and they may as well say, thatPhysitiansare the onlymurtherers. APhilosophick Atheist, is as goodsense as a Divine one."—Glanvill's Apology for Philosophy, at end ofScepsis Scientifica, Ed. I. p. 177, seq.
Ἔστι γὰρ ἀπαιδευσία τὸ μὴ γιγνώσκειν τίνων δεῖ ζητ͂ειν ἀπόδειξιν κὰι τίνων οὐ δεῖ Ὅλως μὲν γὰρ ἁπάντων ἀδύνατον ἀπόδειξιν εἶναι· εἰς ἄπειρον γὰρ ἀν βαδίζοι, ὥστε μηδ' οὕτως εἶναι ἀπόδειξιν.Arist.Metaph.IV. (Γ) cap. 4.
The following is the translation of MM. Pierron et Zévort: "C'est de l'ignorance de ne pas savoir distinguer ce qui a besoin de démonstration de ce qui n'en a pas besoin. Il est absolument impossible de tout démontrer: il faudrait pour cela aller à l'infini; de sorte qu'il n'y aurait même pas de démonstration." Métaphysique d'Aristote, Tome I. p. 116.