FOOTNOTES:

"What would have sufficed in the case of Julius Cæsar, of Seneca, of Petronius, to turn their fearlessness into timidity or braggartry? An obstruction in the spleen, the liver, or thevena portae. For the imagination is intimately connected with these viscera, and from them arise all the curious phenomena of hypochondria and hysteria. . . . 'A mere nothing, a little fibre, some trifling thing that the most subtle anatomy cannot discover, would have made two idiots out of Erasmus and Fontenelle.'"[250:15]

Radical Materialism. Mind as an Epiphenomenon.

§116. The extreme claim that the soul is a physical organ of the body, identical with the brain, marked the culmination of this militant materialism, so good an instance of that over-simplification and whole-hearted conviction characteristic of the doctrinaire propagandism of France. Locke, the Englishman, had admitted that possibly the substance which thinks is corporeal. In the letters ofVoltaire this thought has already found a more positive expression:

"I am body, and I think; more I do not know. Shall I then attribute to an unknown cause what I can so easily attribute to the only fruitful cause I am acquainted with? In fact, where is the man who, without an absurd godlessness, dare assert that it is impossible for the Creator to endow matter with thought and feeling?"[251:16]

Finally, Holbach, the great systematizer of this movement, takes the affair out of the hands of the Creator and definitively announces that "a sensitive soul is nothing but a human brain so constituted that it easily receives the motions communicated to it."[251:17]

This theory has been considerably tempered since the age of Holbach. Naturalism has latterly been less interested in identifying the soul with the body, and more interested in demonstrating its dependence upon specific bodily conditions, after the manner of La Mettrie. The so-called higher faculties, such as thought and will, have been related to central orcorticalprocesses of the nervous system, processes of connection and complication which within the brain itself supplement the impulses and sensations congenitally and externallystimulated. The term "epiphenomenon" has been adopted to express the distinctness but entire dependence of the mind. Man is "a conscious automaton." The real course of nature passes through his nervous system, while consciousness attends upon its functions like a shadow, present but not efficient.[252:18]

Knowledge, Positivism and Agnosticism.

§117. Holbach's "Système de la Nature," published in 1770, marks the culmination of the unequivocally materialistic form of naturalism. Its epistemological difficulties, always more or less in evidence, have since that day sufficed to discredit materialism, and to foster the growth of a critical and apologetic form of naturalism known aspositivismoragnosticism. The modesty of this doctrine does not, it is true, strike very deep. For, although it disclaims knowledge of ultimate reality, it also forbids anyone else to have any. Knowledge, it affirms, can be of but one type, that which comprises the verifiable laws governing nature. All questions concerningfirst causes are futile, a stimulus only to excursions of fancy popularly mistaken for knowledge. The superior certainty and stability which attaches to natural science is to be permanently secured by the savant's steadfast refusal to be led away after the false gods of metaphysics.

But though this is sufficient ground for an agnostic policy, it does prove an agnostic theory. The latter has sprung from a closer analysis of knowledge, though it fails to make a very brave showing for thoroughness and consistency. The crucial point has already been brought within our view. The general principles of naturalism require that knowledge shall be reduced to sensations, or impressions of the environment upon the organism. But the environment and the sensations do not correspond. The environment is matter and motion, force and energy; the sensations are of motions, to be sure, but much more conspicuously of colors, sounds, odors, pleasures, and pains. Critically, this may be expressed by saying that since the larger part of sense-perception is so unmistakably subjective, and since all knowledge alike must be derived from this source, knowledge as a whole must be regarded as dealing only with appearances. There are at least three agnosticmethods progressing from this point. All agree that the inner or essential reality is unfathomable. But, in the first place, those most close to the tradition of materialism maintain that the most significant appearances, the primary qualities, are those which compose a purely quantitative and corporeal world. The inner essence of things may at any rate beapproachedby a monism of matter or of energy. This theory is epistemological only to the extent of moderating its claims in the hope of lessening its responsibility. Another agnosticism places all sense qualities on a par, but would regard physics and psychology as complementary reports upon the two distinct series of phenomena in which the underlying reality expresses itself. This theory is epistemological to the extent of granting knowledge, viewed as perception, as good a standing in the universe as that which is accorded to its object. But such a dualism tends almost irresistibly to relapse into materialistic monism, because of the fundamental place of physical conceptions in the system of the sciences. Finally, in another and a more radical phase of agnosticism, we find an attempt to make full provision for the legitimate problems of epistemology. The only datum, the only existent accessible to knowledge,is said to be the sensation, or state of consciousness. In the words of Huxley:

"What, after all, do we know of this terrible 'matter' except as a name for the unknown and hypothetical cause of states of our own consciousness? And what do we know of that 'spirit' over whose threatened extinction by matter a great lamentation is arising, . . . except that it is also a name for an unknown and hypothetical cause, or condition, of states of consciousness?"[255:19]

The physical world is now to be regarded as a construction which does not assimilate to itself the content of sensations, but enables one to anticipate them. The sensation signifies a contact to which science can provide a key for practical guidance.

Experimentalism.

§118. This last phase of naturalism is an attempt to state a pure and consistent experimentalism, a workable theory of the routine of sensations. But it commonly falls into the error of the vicious circle. The hypothetical cause of sensations is said to be matter. From this point of view the sensation is a complex, comprising elaborate physical and physiological processes. But these processes themselves, on the other hand, are said to be analyzable into sensations. Now two such methods of analysis cannot be equally ultimate. If all of reality is finally reducible tosensations, then the term sensation must be used in a new sense to connote a self-subsistent being, and can no longer refer merely to a function of certain physiological processes. The issue of this would be some form of idealism or of the experience-philosophy that is now coming so rapidly to the front.[256:20]But while it is true that idealism has sometimes been intended, and that a radically new philosophy of experience has sometimes been closely approached, those, nevertheless, who have developed experimentalism from the naturalistic stand-point have in reality achieved only a thinly disguised materialism. Forthe very ground of their agnosticism is materialistic.[256:21]Knowledge of reality itself is said to be unattainable, because knowledge, in order to come within the order of nature, must be regarded as reducible to sensation; and because sensation itself, when regarded as a part of nature, is only a physiological process, a special phenomenon, in no way qualified to be knowledge that is true of reality.

Naturalistic Epistemology not Systematic.

§119. Perhaps, after all, it would be as fair to the spirit of naturalism to relieve it of responsibilityfor an epistemology. It has never thoroughly reckoned with this problem. It has deliberately selected from among the elements of experience, and been so highly constructive in its method as to forfeit its claim to pure empiricism; and, on the other hand, has, in this same selection of categories and in its insistence upon the test of experiment, fallen short of a thorough-going rationalism. While, on the one hand, it defines and constructs, it does so, on the other hand, within the field of perception and with constant reference to the test of perception. The explanation and justification of this procedure is to be found in the aim of natural science rather than in that of philosophy. It is this special interest, rather than the general problem of being, that determines the order of its categories. Naturalism as an account of reality is acceptable only so far as its success in satisfying specific demands obtains for it a certain logical immunity. These demands are unquestionably valid and fundamental, but they are not coextensive with the demand for truth. They coincide rather with the immediate practical need of a formulation of the spacial and temporal changes that confront the will. Hence naturalism is acceptable to common-sense as an account ofwhat the every-day attitude to the environment treats as its object. Naturalism is common-sense about the "outer world," revised and brought up to date with the aid of the results of science. Its deepest spring is the organic instinct for the reality of the tangible, the vital recognition of the significance of that which is on the plane of interaction with the body.

General Ethical Stand-point.

§120. Oddly enough, although common-sense is ready to intrust to naturalism the description of the situation of life, it prefers to deal otherwise with its ideals. Indeed, common-sense is not without a certain suspicion that naturalism is the advocate of moral reversion. It is recognized as the prophecy of the brute majority of life, of those considerations of expediency and pleasure that are the warrant for its secular moods rather than for its sustaining ideals. And that strand of life is indeed its special province. For the naturalistic method of reduction must find the key to human action among those practical conditions that are common to man and his inferiors in the scale of being. In short, human life, like all life, must be construed as the adjustment of the organism to its natural environment forthe sake of preservation and economic advancement.

Cynicism and Cyrenaicism.

§121. Early in Greek philosophy this general idea of life was picturesquely interpreted in two contrasting ways, those of the Cynic and the Cyrenaic. Both of these wise men postulated the spiritual indifference of the universe at large, and looked only to thecontactof life with its immediate environment. But while the one hoped only to hedge himself about, the other sought confidently the gratification of his sensibilities. The figure of the Cynic is the more familiar. Diogenes of the tub practised self-mortification until his dermal and spiritual callousness were alike impervious. From behind his protective sheath he could without affectation despise both nature and society. He could reckon himself more blessed than Alexander, because, with demand reduced to the minimum, he could be sure of a surplus of supply. Having renounced all goods save the bare necessities of life, he could neglect both promises and threats and be played upon by no one. He was securely intrenched within himself, an unfurnished habitation, but the citadel of a king. The Cyrenaic, on the other hand, did not seek to make impervious the surfaceof contact with nature and society, but sought to heighten its sensibility, that it might become a medium of pleasurable feeling. For the inspiration with which it may be pursued this ideal has nowhere been more eloquently set forth than in the pages of Walter Pater, who styles himself "the new Cyrenaic."

"Not the fruit of experience, but experience itself, is the end. A counted number of pulses only is given to us of a variegated, dramatic life. How may we see in them all that is to be seen in them by the finest senses? How shall we pass most swiftly from point to point, and be present always at the focus where the greatest number of vital forces unite in their purest energy?To burn always with this hard, gemlike flame, to maintain this ecstacy, is success in life. . . . While all melts under our feet, we may well catch at any exquisite passion, or any contribution to knowledge that seems by a lifted horizon to set the spirit free for a moment, or any stirring of the senses, strange dyes, strange colors, and curious odors, or work of the artist's hands, or the face of one's friend. Not to discriminate every moment some passionate attitude in those about us, and in the brilliancy of their gifts some tragic dividing of forces on their ways, is, on this short day of frost and sun, to sleep before evening."[261:22]

To burn always with this hard, gemlike flame, to maintain this ecstacy, is success in life. . . . While all melts under our feet, we may well catch at any exquisite passion, or any contribution to knowledge that seems by a lifted horizon to set the spirit free for a moment, or any stirring of the senses, strange dyes, strange colors, and curious odors, or work of the artist's hands, or the face of one's friend. Not to discriminate every moment some passionate attitude in those about us, and in the brilliancy of their gifts some tragic dividing of forces on their ways, is, on this short day of frost and sun, to sleep before evening."[261:22]

Development of Utilitarianism. Evolutionary Conception of Social Relations.

§122. In the course of modern philosophy the ethics of naturalism has undergone a transformationand development that equip it much more formidably for its competition with rival theories. If the Cynic and Cyrenaic philosophies of life seem too egoistic and narrow in outlook, this inadequacy has been largely overcome through the modern conception of the relation of the individual to society. Man is regarded as so dependent upon social relations that it is both natural and rational for him to govern his actions with a concern for the community. There was a time when this relation of dependence was viewed as external, a barter of goods between the individual and society, sanctioned by an implied contract. Thomas Hobbes, whose unblushing materialism and egoism stimulated by opposition the whole development of English ethics, conceived morality to consist in rules of action which condition the stability of the state, and so secure for the individual that "peace" which self-interest teaches him is essential to his welfare.

"And therefore so long a man is in the condition of mere nature, which is a condition of war, as private appetite is the measure of good and evil: and consequently all men agree on this, that peace is good, and therefore also the ways or means of peace, which, as I have showed before, are 'justice,' 'gratitude,' 'modesty,''equity,' 'mercy,' and the rest of the laws of Nature, are good; that is to say, 'moral virtues'; and their contrary 'vices,' evil."[262:23]

Jeremy Bentham, the apostle of utilitarianism in the eighteenth century, defined political and social sanctions through which the individual could purchase security and good repute with action conducive to the common welfare. But the nineteenth century has understood the matter better—and the idea of an evolution under conditions that select and reject, is here again the illuminating thought. No individual, evolutionary naturalism maintains, has survived the perils of life without possessing as an inalienable part of his nature, congenital like his egoism, certain impulses and instinctive desires in the interest of the community as a whole. The latest generation of a race whose perpetuation has been conditioned by a capacity to sustain social relations and make common cause against a more external environment,ismoral, and does not adopt morality in the course of a calculating egoism. Conscience is the racial instinct of self-preservation uttering itself in the individual member, who draws his very life-blood from the greater organism.

Naturalistic Ethics not Systematic.

§123. This latest word of naturalistic ethics hasnot won acceptance as the last word in ethics, and this in spite of its indubitable truth within its scope. For the deeper ethical interest seeks not so much to account for the moral nature as to construe and justify its promptings. The evolutionary theory reveals the genesis of conscience, and demonstrates its continuity with nature, but this falls as far short of realizing the purpose of ethical study as a history of the natural genesis of thought would fall short of logic. Indeed, naturalism shows here, as in the realm of epistemology, a persistent failure to appreciate the central problem. Its acceptance as a philosophy, we are again reminded, can be accounted for only on the score of its genuinely rudimentary character. As a rudimentary phase of thought it is both indispensable and inadequate. It is the philosophy of instinct, which should in normal development precede a philosophy of reason, in which it is eventually assimilated and supplemented.

Naturalism as Antagonistic to Religion.

§124. There is, finally, an inspiration for life which this philosophy of naturalism may convey—atheism, its detractors would call it, but none the less a faith and a spiritual exaltation that spring from its summing up of truth.It is well first to realize that which is dispiriting in it, its failure to provide for the freedom, immortality, and moral providence of the more sanguine faith.

"For what is man looked at from this point of view? . . . Man, so far as natural science by itself is able to teach us, is no longer the final cause of the universe, the Heaven-descended heir of all the ages. His very existence is an accident, his story a brief and transitory episode in the life of one of the meanest of the planets. Of the combination of causes which first converted a dead organic compound into the living progenitors of humanity, science, indeed, as yet knows nothing. It is enough that from such beginnings famine, disease, and mutual slaughter, fit nurses of the future lords of creation, have gradually evolved, after infinite travail, a race with conscience enough to feel that it is vile, and intelligence enough to know that it is insignificant. . . . We sound the future, and learn that after a period, long compared with the individual life, but short indeed compared with the divisions of time open to our investigation, the energies of our system will decay, the glory of the sun will be dimmed, and the earth, tideless and inert, will no longer tolerate the race which has for a moment disturbed its solitude. Man will go down into the pit, and all his thoughts will perish. The uneasy consciousness, which in this obscure corner has for a brief space broken the contented silence of the universe, will be at rest. Matter will know itself no longer. 'Imperishable monuments' and 'immortal deeds,' death itself, and love stronger than death, will be as though they had never been. Nor will anything thatisbe better or be worse for all that the labor, genius, devotion,and suffering of man have striven through countless generations to effect."[265:24]

Naturalism as the Basis for a Religion of Service, Wonder, and Renunciation.

§125. But though our philosopher must accept the truth of this terrible picture, he is not left without spiritual resources. The abstract religion provided for the agnostic faithful by Herbert Spencer does not, it is true, afford any nourishment to the religious nature. He would have men look for a deep spring of life in the negative idea of mystery, the apotheosis of ignorance, while religious faith to live at all must lay hold upon reality. But there does spring from naturalism a positive religion, whose fundamental motives are those of service, wonder, and renunciation: service of humanity in the present, wonder at the natural truth, and renunciation of a universe keyed to vibrate with human ideals.

"Have you," writes Charles Ferguson, "had dreams of Nirvana and sickly visions and raptures? Have you imagined that the end of your life is to be absorbed back into the life of God, and to flee the earth and forget all? Or do you want to walk on air, or fly on wings, or build a heavenly city in the clouds? Come, let us take our kit on our shoulders, and go out and build the cityhere."[265:25]

For Haeckel "natural religion" is such as

"the astonishment with which we gaze upon the starry heavens and the microscopic life in a drop of water, the awe with which we trace the marvellous working of energy in the motion of matter, the reverence with which we grasp the universal dominance of the law of substance throughout the universe."[266:26]

There is a deeper and a sincerer note in the stout, forlorn humanism of Huxley:

"That which lies before the human race is a constant struggle to maintain and improve, in opposition to the State of Nature, the State of Art of an organized polity; in which, and by which, man may develop a worthy civilization, capable of maintaining and constantly improving itself, until the evolution of our globe shall have entered so far upon its downward course that the cosmic process resumes its sway; and, once more, the State of Nature prevails over the surface of our planet."[266:27]

[223:1]Preliminary Note.—Bynaturalismis meant that system of philosophy which defines the universe in the terms ofnatural science. In its dogmatic phase, wherein it maintains thatbeing is corporeal, it is calledmaterialism. In its critical phase, wherein it makes the general assertion that the natural sciences constitute the onlypossible knowledge, whatever be the nature of reality itself, it is calledpositivism,agnosticism, or simplynaturalism.

[226:2]Lucretius:De Rerum Natura, Bk. II, lines 569-580. Translation by Munro.

[229:3]The reader will find an interesting account of these opposing views in Locke's chapter onSpace, in hisEssay Concerning Human Understanding.

[230:4]Descartes distinguished his theory from that of Democritus in thePrinciples of Philosophy, Part IV, § ccii.

[231:5]Pearson:Grammar of Science, pp. 259-260. Cf.ibid., Chap. VII, entire.

[232:6]Quoted in Ueberweg:History of Philosophy, II, p. 124.

[233:7]Quoted from theOpticksof Newton by James Ward, in hisNaturalism and Agnosticism, I, p. 43.

[236:8]Haeckel:Riddle of the Universe. Translation by McCabe, p. 254.The best systematic presentation of "energetics" is to be found in Ostwald'sVorlesungen über Natur-Philosophie. Herbert Spencer, in his well-knownFirst Principles, makes philosophical use of both "force" and "energy."

[236:8]Haeckel:Riddle of the Universe. Translation by McCabe, p. 254.

The best systematic presentation of "energetics" is to be found in Ostwald'sVorlesungen über Natur-Philosophie. Herbert Spencer, in his well-knownFirst Principles, makes philosophical use of both "force" and "energy."

[238:9]Cf.Chap. IX.

[240:10]Lucretius:Op. cit., Bk. I, lines 1021-1237.

[241:11]Quoted from La Place's essay onProbabilityby Ward:Op. cit., I, p. 41.

[243:12]An interesting account and criticism of such a theory (Clifford's) is to be found in Royce'sSpirit of Modern Philosophy, Lecture X.

[244:13]This method replaced the old theory of "catastrophes" through the efforts of the English geologists, Hutton (1726-1797) and Lyell (1767-1849).

[245:14]Harvey's discovery of the circulation of the blood, published in 1628, was regarded as a step in this direction.

[250:15]From the account of La Mettrie in Lange:History of Materialism. Translation by Thomas, II, pp. 67-68.

[251:16]Quoted from Voltaire's LondonLetter on the English, by Lange:Op. cit., II, p. 18.

[251:17]Quoted by Lange:Op. cit., II, p. 113.

[252:18]The phrase "psycho-physical parallelism," current in psychology, may mean automatism of the kind expounded above, and may also mean dualism. It is used commonly as a methodological principle to signify that no causal relationship between mind and body, but one ofcorrespondence, is to be looked for in empirical psychology. Cf. §99.

[255:19]Quoted by Ward:Op. cit., I, p. 18.

[256:20]There are times when Huxley,e. g., would seem to be on the verge of the Berkeleyan idealism. Cf.Chap. IX.

[256:21]For the case of Karl Pearson, read hisGrammar of Science, Chap. II.

[261:22]Pater:The Renaissance, pp. 249-250.

[262:23]Hobbes:Leviathan,Chap. XV.

[265:24]Quoted from Balfour:Foundations of Belief, pp. 29-31.

[265:25]Ferguson:Religion of Democracy, p. 10.

[266:26]Haeckel:Op. cit., p. 344.

[266:27]Huxley:Evolution and Ethics, p. 45.Collected Essays, Vol. IX.

Subjectivism Originally Associated with Relativism and Scepticism.

§126. When, in the year 1710, Bishop Berkeley maintained the thesis of empirical idealism, having rediscovered it and announced it with a justifiable sense of originality, he provoked a kind of critical judgment that was keenly annoying if not entirely surprising to him. In refuting the conception of material substance and demonstrating the dependence of being upon mind, he at once sought, as he did repeatedly in later years, to establish the world of practical belief, and so to reconcile metaphysics and common-sense. Yet he found himself hailed as a fool and a sceptic. In answer to an inquiryconcerning the reception of his book in London, his friend Sir John Percival wrote as follows:

"I did but name the subject matter of your book ofPrinciplesto some ingenious friends of mine and they immediately treated it with ridicule, at the same time refusing to read it, which I have not yet got one to do. A physician of my acquaintance undertook to discover your person, and argued you must needs be mad, and that you ought to take remedies. A bishop pitied you, that a desire of starting something new should put you upon such an undertaking. Another told me that you are not gone so far as another gentleman in town, who asserts not only that there is no such thing as Matter, but that we ourselves have no being at all."[268:2]

There can be no doubt but that the idea of the dependence of real things upon their appearance to the individual is a paradox to common-sense. It is a paradox because it seems to reverse the theoretical instinct itself, and to define the real in those very terms which disciplined thought learns to neglect. In the early history of thought the nature of the thinker himself is recognized as that which is likely to distort truth rather than that which conditions it. When the wise man, the devotee of truth, first makes his appearance, his authority is acknowledged because he has renounced himself. As witness of the universalbeing he purges himself of whatever is peculiar to his own individuality, or even to his human nature. In the aloofness of his meditation he escapes the cloud of opinion and prejudice that obscures the vision of the common man. In short, the element of belief dependent upon the thinker himself is the dross which must be refined away in order to obtain the pure truth. When, then, in the critical epoch of the Greek sophists, Protagoras declares that there is no belief that is not of this character, his philosophy is promptly recognized as scepticism. Protagoras argues that sense qualities are clearly dependent upon the actual operations of the senses, and that all knowledge reduces ultimately to these terms.

"The senses are variously named hearing, seeing, smelling; there is the sense of heat, cold, pleasure, pain, desire, fear, and many more which are named, as well as innumerable others which have no name;with each of them there is born an object of sense,—all sorts of colors born with all sorts of sight and sounds in like manner with hearing, and other objects with the other senses."[269:3]

If the objects are "born with" the senses, it follows that they are born with and appertain to the individual perceiver.

"Either show, if you can, that our sensations are not relative and individual, or, if you admit that they are individual, prove that this does not involve the consequence that the appearance becomes, or, if you like to say, is to the individual only."[270:4]

The same motif is thus rendered by Walter Pater in the Conclusion of his "Renaissance":

"At first sight experience seems to bury us under a flood of external objects, pressing upon us with a sharp and importunate reality, calling us out of ourselves in a thousand forms of action. But when reflexion begins to act upon those objects they are dissipated under its influence; the cohesive force seems suspended like a trick of magic; each object is loosed into a group of impressions—color, odor, texture—in the mind of the observer. . . . Experience, already reduced to a swarm of impressions, is ringed round for each one of us by that thick wall of personality through which no real voice has ever pierced on its way to us, or from us to that which we can only conjecture to be without. Every one of these impressions is the impression of the individual in his isolation, each mind keeping as a solitary prisoner its own dream of a world."

The Protagorean generalization is due to the reflection that all experience is some individual experience, that no subject of discourse escapes the imputation of belonging to some individual's private history. The individual must start with his own experiences and ideas, and he can never getbeyond them, for he cannot see outside his own vision, or even think outside his own mind. The scepticism of this theory is explicit, and the formulas of Protagoras—the famous "Man is the measure of all things," and the more exact formula, "The truth is what appears to each man at each time"[271:5]—have been the articles of scepticism throughout the history of thought.

Phenomenalism and Spiritualism.

§127. There is, therefore, nothing really surprising in the reception accorded the "new philosophy" of Bishop Berkeley. A sceptical relativism is the earliest phase of subjectivism, and its avoidance at once becomes the most urgent problem of any philosophy which proposes to proceed forth from this principle. And this problem Berkeley meets with great adroitness and a wise recognition of difficulties. But his sanguine temperament and speculative interest impel him to what he regards as the extension of his first principle, the reintroduction of the conception of substance under the form of spirit, and of the objective order of nature under the form of the mind of God. In short, there are two motives at work in him, side by side: the epistemological motive, restricting reality to perceptionsand thoughts, and the metaphysical-religious motive, leading him eventually to the definition of reality in terms of perceiving and thinking spirits. And from the time of Berkeley these two principles,phenomenalismandspiritualism, have remained as distinct and alternating phases of subjectivism. The former is its critical and dialectical conception, the latter its constructive and practical conception.

Phenomenalism as Maintained by Berkeley. The Problem Inherited from Descartes and Locke.

§128. Asphenomenalismhas its classic statement and proof in the writings of Berkeley, we shall do well to return to these. The fact that this philosopher wished to be regarded as the prophet of common-sense has already been mentioned. This purpose reveals itself explicitly in the series of "Dialogues between Hylas and Philonous." The form in which Berkeley here advances his thesis is further determined by the manner in which the lines were drawn in his day of thought. The world of enlightened public opinion was then threefold, consisting of God, physical nature, and the soul. In the early years of the seventeenth century Descartes had sharply distinguished between the two substances—mind, with its attribute of thought; and body, with its attribute ofextension—and divided the finite world between them. God was regarded as the infinite and sustaining cause of both. Stated in the terms of epistemology, the object of clear thinking is the physical cosmos, the subject of clear thinking the immortal soul. The realm of perception, wherein the mind is subjected to the body, embarrasses the Cartesian system, and has no clear title to any place in it. And without attaching cognitive importance to this realm, the system is utterly dogmatic in its epistemology.[273:6]For what one substance thinks, must be assumed to be somehow true of another quite independent substance without any medium of communication. Now between Descartes and Berkeley appeared the sober and questioning "Essay Concerning Human Understanding," by John Locke. This is an interesting combination (they cannot be said to blend) of traditional metaphysics and revolutionary epistemology. The universe still consists of God, the immortal thinking soul, and a corporeal nature, the object of its thought. But, except for certain proofs of God and self, knowledge is entirely reduced to the perceptual type, to sensations, or ideas directly imparted to the mind by the objectsthemselves. To escape dogmatism it is maintained that the real is what isobserved to be present. But Locke thinks the qualities so discovered belong in part to the perceiver and in part to the substance outside the mind. Color is a case of the former, a "secondary quality"; and extension a case of the latter, a "primary quality." And evidently the above empirical test of knowledge is not equally well met in these two cases. When I see a red object I know that red exists, for it is observed to be present, and I make no claim for it beyond the present. But when I note that the red object is square, I am supposed to know a property that will continue to exist in the object after I have closed my eyes or turned to something else. Here my claim exceeds my observation, and the empirical principle adopted at the outset would seem to be violated. Berkeley develops his philosophy from this criticism. His refutation of material substance is intended as a full acceptance of the implications of the new empirical epistemology. Knowledge is to be all of the perceptual type, where what is known is directly presented; and, in conformity with this principle, being is to be restricted to the content of the living pulses of experience.

Back to Index Next