Charles Hodge · 54 of 114

4. Materialism. · Part 1

§ 4. Materialism.

Materialism is that system which ignores the distinction between matter and mind, and refers all the phenomena of the world, whether physical, vital, or mental, to the functions of matter.

A. The Doctrine of Epicurus.

Epicurus taught, (1.) That as ex nihilo nihil fit, the universe has always existed, and must continue to exist forever. (2.) That space, and the number of bodies which it contains, are infinite. (3.) These bodies are of two kinds, simple and compound. The simple bodies are atoms possessing form, magnitude, and weight. They are indivisible, unalterable, and indestructible. This is also the doctrine of modern science. Faraday says, “A particle of oxygen is ever a particle of oxygen, — nothing can in the least wear it. If it enters into combination, and disappears as oxygen; if it pass through a thousand combinations, animal, vegetable, and mineral — if it lie hid for a thousand years, and then be evolved, it is oxygen with its first qualities, neither more nor less. It has all its original force, and only that; the amount of force which it disengaged when hiding itself, has again to be employed in a reverse direction when it is set at liberty.” (4.) These atoms have their peculiar forces, distinct from their mere gravity. This, too, is the doctrine of modern science. It is included in what Faraday says in the passage just quoted. “Molecules,” say the scientific men of our day, “have been endowed with forces which give rise to various chemical qualities, and these never change either in their nature or in their amount.” (5.) Epicurus taught that the quantity of matter, and of course the amount of force in the world, is always the same. Neither can be increased or diminished. (6.) The atoms, of which the number is infinite, move through space with incredible velocity under the guidance of necessary physical laws. (7.) By the combination of these atoms under the influence of gravity and other physical forces, the universe was formed, and became a cosmos. This is very nearly the nebular hypothesis. (8.) The soul is material; or, in other words, all mental phenomena are due to the properties of matter. This, also, is proclaimed as the last result of modern science. (9.) The soul, of course, ceases to exist when the body dies; i.e., as death is the cessation of the vital, so it is also of the intellectual functions of the individual. The atoms of which the man is composed, with the forces which belong to them, continue to exist, and may enter into the composition of other men. But the man, as an individual, ceases to exist. This, almost in so many words, is the avowed doctrine of many physicists of the present day. (10.) Sensation is for us the only source of knowledge. By remembering former sensations, we form ideas, and by the combination of ideas we form judgments. Almost the very words of Hume, and the doctrine of the whole school of which he is the representative. (11.) As Epicurus held that nothing is incorporeal except a vacuum, he of necessity includes all the forms of existence under the head of matter. As there is no mind or spirit, there is no God, and no moral law. Virtue is only a prudent regard to happiness. In a certain sense he admitted the existence of God's, but they were corporeal beings having no concern with the affairs of men.

A recent German writer, in Herzog's “Encyklopädie,” under the head of Materialismus, says that notwithstanding the great progress of modern science, the Materialists of our day have not advanced a step upon the system of Epicurus. That system, probably owing to the dominant influence of the higher philosophy of Plato and Aristotle, did not exert much influence on the ancient mind, or on the progress of human thought. It was not until modern times that Materialism gained any great power as a philosophical theory.

B. Materialism in England during the Eighteenth Century.

Hobbes (1588-1679) anticipated the movement towards Materialism which manifested itself in England during the last century “He made sensation the real basis of every mental operations the sole originator of our ideas, the sole medium and test of truth. As, therefore, we can perceive through sensation only what is material, he concluded that matter is the only reality, and that whatever exists to us must accordingly be a part of the material universe. The whole process of scientific investigation was thus reduced to the doctrine of bodies, beyond which, he maintained, there can be no knowledge whatever accessible to the human mind. This knowledge, however, does not refer simply to the existence of bodies, but also to their changes, of all which changes the ultimate principle is motion. The doctrine of bodies, therefore, includes the knowledge of all phenomena in relation to their probable causes; and of all possible causes as known from their observed effects. . . . . The mind itself he viewed as wholly material, the phenomena of consciousness being the direct result of our organization. The one great and fundamental fact of mind is sensation, which is nothing more or less than the effect of material objects around us, exerted by means of pressure or impact upon that material organization which we term the mind.” Thus it appears that Hobbes anticipated the great result of modern science, that all force may be resolved into motion.

Locke (1632-1704).

The introduction of Materialism into England during the last century is generally attributed to the influence of Locke's philosophy. Locke himself was far from being a Materialist, and the advocates of his system strenuously insist that his principles have no legitimate tendency to obliterate the distinction between matter and mind. Locke, however, in combating the doctrine of “innate ideas,” in the sense of abstract truths, seemed to deny that the mind was so constituted as to apprehend truth intuitively, and beyond the range of experience. He compared the mind to a “tabula rasa.” This figure suggests that all our knowledge is from without, as the slate contributes nothing to the matter written upon it. He defined ideas to be “anything with which the mind is immediately occupied when we think.” The origin of these ideas, he said, was sensation and reflection. If by reflection he meant the observation of the phenomena of the mind, his theory is one thing. If it mean the process of recalling, combining, analyzing, and otherwise elaborating the impressions upon us from without, his theory is another. Probably Locke himself, and certainly many of his followers, took it in the latter sense; and thus the two sources of ideas, or of knowledge, are reduced to one, and that one is sensation. But as sensation can give us the knowledge only of what is external and material, the theory in this form seemed to leave no room for the higher ideas of eternal and necessary truths. Locke attempts to account for our ideas, of time, space, infinity, cause, and even of right and wrong, from observation, i.e., from observation of what is without, or from impressions made upon our senses. It is a common criticism upon Locke's great work, that in it he does not distinguish between the occasion and the source of our ideas. Our experience furnishes the occasion, and it may be the necessary condition, of waking the mind to the perception not only of the fact experienced, but also of the intuitive apprehension of the universal and necessary truth which the fact involves. If we did not see effects produced around us, and did not ourselves exercise efficiency, we might never have the idea of causation; but the conviction that every effect must have a cause is an intuitive judgment, which experience can neither produce nor limit. It is not from the observed tendency of some acts to produce happiness, and of others to produce misery, that we get the idea of the essential distinction between right and wrong; but from the constitution of the mind. Although Locke, and many of his disciples, were satisfied with his method of accounting for our ideas of God, of spirit, and of moral and religious truths, yet it is also certain that many of his followers felt justified on his principles to discard them.

Hartley (1705-1757).

Hartley was a physician and a physiologist. Physiology and psychology have intimate relations. It is perhaps natural that those who devote themselves specially to the former, should make little of the latter. It is the marked characteristic of our age, so far as physicists are concerned, that it tries to merge psychology entirely into physiology. Hartley adopted the principles of Locke, and endeavored to show how it is that external things produce sensation and thought. This he did by his theory of vibrations. “The objects of the external world affect in some manner the extreme ends of the nerves, which spread from the brain as centre to every part of the body. This affection produces a vibration, which is continued along the nerve by the agency of an elastic 'ether, until it reaches the brain, where it constitutes the phenomenon we term sensation. When a sensation has been experienced several times, the vibratory movement from which it arises acquires the tendency to repeat itself spontaneously, even when the external object is not present. These repetitions or relics of sensations are ideas, which in their turn possess the property of recalling each other by virtue of mutual association among themselves.” This doctrine of association of ideas is the most important part of his system. He insists principally on the following law: “An idea is sometimes associated with another through the medium of a third; but in process of time this intermediate idea may be disregarded, and yet the connection between the first and third may, notwithstanding, remain. Thus the idea of pleasure, which is so indissolubly connected with money, arises from the conveniences which it is able to procure, while in the mind of the miser the conveniences are lost sight of, and the very possession of the money itself is regarded as containing the whole enjoyment. In this way Hartley accounts for almost all the emotions and passions of the human mind. The domestic affections, for instance, arise from the transference of the pleasure derived from parental kindness to the parent itself; the social and patriotic affections from transferring the pleasures of society to the country which affords them; in like manner, also, the moral and religious affections, the love of virtue and the love of God, arise from the pleasures connected with virtuous and pious conduct, being transferred to the law of action, or to the supreme Lawgiver, from whom these pleasures have emanated.” The connection of this theory with Materialism is obvious. If vibrations of the brain constitute sensation, and if the relics, or spontaneous repetitions of these vibrations constitute thought and feeling, then all mental and moral acts are mere affections of our material organism. It is also obvious that, according to this theory, there is no more freedom in volition than in sensation. The former is a mode, or relic of the latter. Although this tendency of his system was undeniable, and although his successors drew these conclusions from his principles, Hartley himself was not a Materialist. He was a very religious man. It is not at all uncommon for a man to hold a speculative theory inconsistent with his faith.

Morell quotes the following criticism of Hartley's doctrine from the “Edinburgh Review": “There may be,” says the reviewer, “little shakings in the brain, for anything we know, and there may even be shakings of a different kind accompanying every act of thought or perception; — but that the shakings themselves are the thought or perception, we are so far from admitting, that we find it absolutely impossible to comprehend what is meant by the assertion. The shakings are certain throbbings, vibrations, or stirrings, in a whitish, half-fluid substance like custard, which we might see perhaps, or feel, if we had eyes and fingers sufficiently small or fine for the office. But what should we see or feel, upon the supposition that we could detect by our senses, everything that actually took place in the brain? We should see the particles of this substance change their place a little, move a little up or down, to the right or the left, round about or zigzag, or in some other course or direction. This is all that we could see, if Dr. Hartley's conjecture were proved by actual observation; because this is all that exists in motion, according to our conception of it, and all that we mean when we say that there is motion in any substance. Is it intelligible, then, to say, that this motion, the whole of which we see and comprehend, is thought and feeling, and that thought and feeling will exist, wherever we can excite a similar motion in a similar substance? — In our humble apprehension the proposition is not so much false, as utterly unmeaning and incomprehensible.”

If history repeats itself, so does philosophy. What the “Edinburgh Review" said of Hartley nearly seventy years ago, Professor Tyndall says of the Materialists of our day. “The passage from the physics of the brain to the corresponding facts of consciousness is unthinkable. Granted that a definite thought and a definite molecular action in the brain occur simultaneously; we do not possess the intellectual organ, nor apparently any rudiment of the organ, which would enable us to pass, by a process of reasoning, from the one phenomenon to the other. They appear together, but we do not know why. Were our minds and senses so expanded, strengthened, and illuminated, as to enable us to see and feel the very molecules of the brain; were we capable of following all their motions, all their grouping, all their electric discharges, if such there be; and were we intimately acquainted with the corresponding states of thought and feeling, we should probably be as far as ever from the solution of the problem. How are these physical processes connected with the facts of consciousness? The chasm between the two classes of phenomena would still remain intellectually impassable. Let the consciousness of lose, for example, be associated with a right-handed spiral motion of the molecules of the brain, and the consciousness of hate with a left-handed spiral motion. We should then know when we love that the motion is in one direction, and when we hate that the motion is in the other, but the 'Why?' would still remain unanswered. In affirming that the growth of the body is mechanical, and that thought, as exercised by us, has its correlative in the physics of the brain, I think the position of the 'Materialist' is stated as far as that position is a tenable one. I think the Materialist will be able finally to maintain this position against all attacks; but I do not think, as the human mind is at present constituted, that he can pass beyond it. I do not think he is entitled to say that his molecular grouping and his molecular motions explain everything. In reality they explain nothing.”

Priestley (1733-1804).

Priestley owes his permanent reputation to his important discoveries in the department of physical science. He was, however, prominent during his life for the part he took in philosophical and theological controversies. Devoted to science, the senses were for him the great sources of knowledge; all others, except supernaturaI revelation which he admitted, he distrusted. He adopted with enthusiasm the theory of Hartley which resolved thought and feeling into vibrations of the brain. Hartley, he said, had done more for the doctrine of mind than Newton accomplished for the theory of the material universe. He did not hesitate to avow himself a Materialist. “Priestley,” says Morell, “rested the truth of Materialism upon two deductions. The first was, that thought and sensation are essentially the same thing — that the whole variety of our ideas, however abstract and refined they may become, are, nevertheless, but modifications of the sensational faculty. . . . . The second deduction was, that all sensation, and, consequently, all thought, arises from the affections of our material organization, and therefore consists entirely in the motion of the material particles of which the nerves and brain are composed.” He was a necessitarian, and in morals a utilitarian. Believing, however, in God and in divine revelation, he admitted a future state of existence. As the Bible teaches the doctrine of the resurrection of the body, Priestley believed that man would be restored to conscious existence when that event occurred. His principal works bearing on this subject are: “Examination of Reid, Beattie, and Oswald,” “Doctrine of Philosophical Necessity Explained,” “Disquisitions relating to Matter and Spirit,” and “Hartley's Theory of the Human Mind, with Essays relating to the subject of it.”

Hume is regarded as their master by the most advanced physicists of the modern scientific school, so far as their general principles and method of philosophizing are concerned. He was neither a Materialist nor an Idealist, but rather a Nihilist, as his great object was to show that no certainty could be attained in any department of knowledge. He affirmed nothing and denied everything. Such knowledge as we have comes from sensation, therefore, he maintained that as we have no sensation of efficiency, we can have no idea of it, and no evidence of its reality. A cause is not that which produces an effect, but simply that which uniformly precedes it. Consequently, anything can be the cause of anything. Again, as we have no perception by the senses of substance, there can be no such thing. This applies to mind as well as matter. Nothing exists to us but our thoughts and feelings. We are “nothing but a bundle or collection of different perceptions, which succeed each other with an inconceivable rapidity, and are in perpetual flux and movement.”

C. Materialism in France during the Eighteenth Century.

The sensational philosophy, as it is called, found a much more congenial soil in France than in England. Locke's “Essay" was translated into the language of that country and made the subject of comments and lectures. His leading principles were adopted without the limitations and qualifications with which he had presented them, and conclusions drawn from them which Locke would have been the first to repudiate.

Condillac, one of the first and most influential of the disciples of Locke, in his first work, “Essai sur l’Origine des Connaissances Humaines,” differed comparatively little from the English philosopher. But in his “Traité des Sensations,” he virtually discarded “reflection" as a source of our ideas, and regarded all thoughts, feelings, and volitions as “transformed sensations.” “While he answered the question concerning the relation between the soul and body, by assuming their identity, he took theistic ground in accounting for the origin of the world. This middle ground was occupied also, at least ostensibly, by Diderot and D’Alembert in the French “Encyclopédie,” who, notwithstanding their sensational theory as to the source of our knowledge, and their making happiness the ground of morals and end of life, not only maintained theistic principles, but insisted on the necessity of a divine revelation. This, however, was probably more a matter of prudence than of conviction.”

These, however, were only the first steps. The extreme of materialistic atheism was soon reached and avowed. La Mettrie published his “L’Histoire Naturelle de l’Ame" in 1745, his “L’Homme Machine,” the same year, and his “L’Homme Planté,” in 1749. Helvetius published his work “De l’Esprit" in 1758. His book entitled “De l’Homme" was published after his death. The climax was reached by Baron d’Holbach in his “Système de la Nature,” in which Materialism, fatalism, and atheism were openly avowed. According to this system matter and motion are eternal; thought is an agitation of the nerves; the soul the result of our corporeal organization; the will the strongest sensation; the ground of morals a regard to our own happiness. There is no freedom, no morality, no future existence, no God. When these principles got hold of the popular mind, then came the end.

D. Positivism.

Comte, the author of the “Positive Philosophy,” was born in 1798, and died in 1859. The greater part of his life was passed in poverty and neglect. His only occupation was teaching. Ten years were devoted to the preparation of a course of lectures on philosophy which secured him wealth and fame. He called his system “Philosophie Positive,” because it purported “to assume nothing beyond the content of observed facts.”

The fundamental principle of the “Positive Philosophy" is the one so often referred to, namely, that the senses are the only source of our knowledge, hence nothing exists but matter. There is no mind distinct from matter; no such thing as efficiency; no causes, whether first or final; no God; no future state of existence for man. Theology and psychology are, therefore, banished from the domain of science. Science is solely occupied in the observation of facts, and in deducing from them the laws by which they are determined. These laws, however, are not forces operating in a uniform manner, but simply statements of the actual order in the sequence of events. This sequence is not only uniform but necessary. Our business is simply to ascertain what it is. The only method by which this can be done is observation. This task is much easier in some departments than in others; for in some the facts to be observed are less numerous and less complicated. In mathematics and astronomy the facts are all of one kind; whereas in physiology and sociology they are of very different kinds, and vastly more complicated. The same rule, however, applies to all departments. In all, the sequence of events is uniform and necessary; and if we can only, by a sufficient induction of facts, ascertain what the law of sequence is, we shall be able to predict the future as certainly in one department as in another. The astronomer can tell what will be the position of the stars and planets a century hence. The Positivist will he able to foretell with equal certainty how a man will act in any given circumstances, and what will be the progress and state of society in time to come.

It follows, therefore, according to the Positive Philosophy, (1.) That all our knowledge is confined to physical phenomena. (2.) That all we can know of such phenomena is, that they are, and the relations in which they stand to each other. (3.) That these relations are all included under the heads of sequence and resemblance. (4.) These relations constitute the laws of nature, and are invariable. (5.) As everything that exists is material, these laws, or “invariable relations of succession and resemblance,” control all the phenomena of mind, as we call it, and of social life and of history, as well as those of nature, in the common sense of that word. (6.) As everything is included in the department of physics, everything is controlled by physical laws, and there is no more freedom in human acts than in the motions of the stars; and, therefore, the one can be predicted with the same certainty as the other.

The following quotations from the “Philosophie Positive,” “freely translated and condensed by Harriet Martineau,” include all the points above mentioned.

“The first characteristic of the Positive Philosophy is that it regards all phenomena as subjected to invariable natural laws. Our business is, — seeing how vain is any research into what are called causes, whether first or final, — to pursue an accurate discovery of these laws, with a view to reducing them to the smallest possible number.” “Our positive method of connecting phenomena is by one or other of two relations, — that of similitude or that of succession, — the mere fact of such resemblance or succession being all that we can pretend to know; and all that we need to know; for this perception comprehends all knowledge which consists in elucidating something by something else, — in now explaining, and now foreseeing certain phenomena, by means of the resemblance or sequence of other phenomena.” “If we regard these functions [of the mind] under their statical aspect,— that is, if we consider the conditions under which they exist, — we must determine the organic circumstances of the case, which inquiry involves it with anatomy and physiology. If we look at the dynamic aspect, we have to study simply the exercise and results of the intellectual powers of the human race, which is neither more nor less than the general object of the Positive Philosophy."Vol. i. p. 11.

Comte is obliged to use the word “power,” and to speak of its exercise, yet all his philosophy denies the existence of any such thing as efficiency. The laws which determine events are nothing more than facts of uniform sequence. According to the passage just quoted, one department of psychology (the statical) belongs to anatomy and physiology; the other (the dynamic) to the observed sequence of certain facts called intellectual. The sequence is invariable. The intervention of will is necessarily excluded, because philosophy, at least Positivism, is nothing unless it secures the power of prevision. But free acts cannot be foreseen by man. Hence Comte says, “The arbitrary can never be excluded while political phenomena are referred to will, divine or human, instead of being connected with invariable natural laws.” “If social events were always exposed to disturbance by the accidental intervention of the legislator, human or divine, no scientific prevision of them would be possible.”

Intellectual exercises being regarded as a function of the brain, Comte says, “The positive theory of the intellectual and affective functions is therefore henceforth unchangeably regarded as consisting in the study, both rational and experimental, of the various phenomena of internal sensibility, which are proper to the cerebral ganglia, apart from their external apparatus. It is, therefore, simply a prolongation of animal physiology, properly so called, when this is extended so as to include the fundamental and ultimate attributes.”

Comte, being an ardent phrenologist, founded one of the arguments for his system on the organization of the brain; but his great dependence was upon the law of human development. He admitted no essential difference between man and irrational animals. The superiority of man is only in the degree of his intelligence, which is due to his better physical organization. According to Comte, the whole human race, and every individual man, passes through three distinct stages, which he calls the theological, the metaphysical, and the positive. During the first stage all events are referred to supernatural causes. In the first part of this stage of their progress, men were fetich-worshippers; then they gradually became polytheists, and monotheists. This he endeavors to prove historically in regard to the Greeks, the Romans, and the inhabitants of western Europe. As men outgrew the fetich age, so they outgrew the polytheistic and monotheistic forms of belief. That is, they ceased to refer phenomena to the agency of supernatural beings.

During the metaphysical stage, phenomena are referred to unseen causes, to occult powers, or forces, that is, to something which the senses cannot detect. This also has passed away, and men have come to recognize the great fact that there are no spiritual agencies in the universe, no efficient causes, nothing but events to be arranged according to the laws of sequence and resemblance. The order of events is invariable and necessary. What it has been in the past, it will be in the future. As this is the law of the development of the race collectively, so it is of the individual man. Every one, in his progress from infancy to manhood, passes through these several stages, the theological, the metaphysical, and the positive. We first believe in supernatural agencies (witches, ghosts, souls, angels, etc.); then in occult causes; then only in facts discerned by the senses. The history of the race and the experience of the individual man are thus made the broad and sure foundation of the Positive Philosophy.

Remarks.

1. Considering that the advocates of this philosophy are a mere handful; considering that nine hundred and ninety-nine millions of the thousand millions of our race still believe in God, it is a rather violent assumption that mankind have reached the stage of Positivism. It may be readily admitted that the progress of science and of Christianity has banished alchemy, astrology, witchcraft, and necromancy from enlightened portions of our race, but it has had a scarcely discernible effect in banishing belief in mind as distinct from matter, or in efficient causes, or in God. Admitting, therefore, the principle of the argument to be correct, the conclusion arrived at is contradicted by facts.

2. The principle itself, however, is a groundless assumption. There has been no such development of the race, and there is no such development of the individual man, as the argument supposes. Much less is it true, as Comte maintains, that these several methods of dealing with phenomena are antagonistic and mutually exclusive; that if we believe in spiritual agents, we cannot believe in unseen, metaphysical causes; and that if we believe in the latter we cannot believe in the former. The fact is, the great mass of mankind, educated and uneducated, believe in both. They believe in God and mind, as well as in occult causes, such as electricity, magnetism, and other physical forces; which, in Comte's sense of the word, are metaphysical.

With regard to this assumed law of progress, Prof. Huxley, who is as completely emancipated from the trammels of authority as any man of science now living, says, in the first place, that Comte contradicts himself as to this fundamental principle. In proof he quotes a long passage from the “Philosophie Positive,” in which Comte teaches, — “(a.) As a matter of fact, the human intellect has not been invariably subjected to the law of the three states, and, therefore, the necessity of the law cannot be demonstrable à priori. (b.) Much of our knowledge of all kinds has not passed through the three states, and more particularly, as M. Comte is careful to point out, not through the first. (c.) The positive state has more or less coexisted with the theological, from the dawn of human intelligence. And, by way of completing the series of contradictions, the assertion that the three states are ‘essentially different and even radically opposed,’ is met a little lower on the same page by the declaration that 'the metaphysical state is, at bottom, nothing but a simple general modification of the first.'" “Men of science,” he adds, “are not in the habit of paying much attention to 'laws' stated in this fashion.”