Charles Hodge · 56 of 114

4. Materialism. · Part 3

Mental Phenomena.

Not only are the operations of vegetable and animal life, according to the new doctrine, due to physical forces, but the same is true of all mental operations. If the argument from analogy is valid in the one case, it is valid in the other. If we must believe that the properties of protoplasm, or living matter, are to be referred to the mode in which its molecules are aggregated, because the properties of water are due to the peculiar aggregation of the atoms of which its elements, hydrogen and oxygen, are composed; then we must believe that all thought and feeling are due to the molecular composition and movements of the brain atoms. Accordingly, Professor Huxley, after saying that “vitality" has no better philosophical standing than “aquosity,” warns his readers that they cannot stop with that admission. “I bid you beware,” he says, “that in accepting these conclusions, you are placing your feet on the first rung of a ladder, which in most people's estimation is the reverse of Jacob's, and leads to the antipodes of heaven. It may seem a small thing to admit that the dull vital actions of a fungus or a foraminifer are the properties of their protoplasm, and are the direct results of the nature of the matter of which they are composed. But if, as I have endeavored to prove to you, their protoplasm is essentially identical with, and most readily converted into, that of any animal, I can discover no logical halting-place, between the admission that such is the case, and the further concession that all vital action may with equal propriety be said to be the result of the molecular forces of the protoplasm which displays it. And if so, it must be true, in the same sense and to the same extent, that the thoughts to which I am now giving utterance, and your thoughts regarding them, are the expression of molecular changes in that matter of life which is the source of our other vital phenomena.” “Further,” he says, “I take it to be demonstrable that it is utterly impossible to prove that anything whatever may not be the effect of a material and necessary cause, and that human logic is equally incompetent to prove that any act is really spontaneous. A really spontaneous act is one which, by the assumption, has no cause [i.e. no material cause, for he admits no other]; and the attempt to prove such a negative as this is, on the face of the matter, absurd. And while it is thus a philosophical impossibility to demonstrate that any given phenomenon is not the effect of a material cause, any one who is acquainted with the history of science will admit that its progress has in all ages meant, and now more than ever means, the extension of the province of what we call matter and causation, and the concomitant gradual banishment from all regions of human thought of what we call spirit and spontaneity.” “After all, what 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? In other words, matter and spirit are but names for the imaginary substrata of groups of natural phenomena.” “As surely as every future grows out of past and present, so will the physiology of the future gradually extend the realm of matter and law until it is co-extensive with knowledge, with feeling, and with action.” He cites the often-quoted exhortation of Hume, and enforces “the most wise advice" which it contains. “If we take in our hand,” says Hume, “any volume of divinity or school-metaphysics, for instance; let us ask, does it contain any abstract reasoning concerning quantity or number? No. Does it contain any experimental reasoning concerning matter of fact or existence? No. Commit it, then, to the flames; for it can contain nothing but sophistry and illusion.”

The history of human speculation does not furnish a more explicit avowal of Materialism than that contained in the above quotations. All known effects are ascribed to material causes. Spirit is declared to have only an imaginary existence. Spontaneity is pronounced an absurdity. Necessity is affirmed to be inexorable and universal. Yet Huxley says he is no Materialist. This in a sense is true. He is not a Materialist, because he believes in neither matter nor spirit. He avows himself a disciple of Hume, who taught that we know nothing but impressions and ideas. Substance, whether material or spiritual, efficiency, and God, are banished from the sphere of knowledge to that of “sophistry and illusion.” He avows his fellowship with Herbert Spencer, the fundamental principle of whose “New Philosophy" is, that all we know, or can know, is, that force is and that it is persistent, while force itself is absolutely inscrutable. This blots the soul and God out of existence, except as those words indicate an unknown force. But as he also holds that all forces are convertible, the distinction between material and mental forces, whether human or divine, is obliterated. He avails himself of the common assumption that his theory does not degrade spirit, but exalts matter. It is the verdict of history, however, as Julius Mäller truly says, “That every attempt to spiritualize matter ends in materializing spirit.” On this subject Spencer says: “Men who have not risen above that vulgar conception which unites with matter the contemptuous epithets 'gross' and 'brute,' may naturally feel dismay at the proposal to reduce the phenomena of life, of mind, and of society, to a level with those which they think so degraded. . . . . The course proposed does not imply a degradation of the so-called higher, but an elevation of the so-called lower.” This at least is an avowal that the phenomena of life, mind, and society are to be referred to material or physical causes. This, indeed, he repeatedly asserts. After insisting on the transformation of physical forces into chemical, and these into vital, he adds, “Many will be alarmed by the assertion that the forces which we distinguish as mental, come within the same generalization. Yet there is no alternative but to make this concession. . . . . Any hesitation to admit that between the physical forces and the sensations there exists a correlation like that between the physical forces themselves, must disappear on remembering how the one correlation like the other, is not qualitive only, but quantitive.” “Various classes of facts unite to prove that the law of metamorphosis, which holds among the physical forces, holds equally between them and the mental forces. . . . . How this metamorphosis takes place — how a force existing as motion, light, or heat, can become a mode of consciousness,” is mysterious; but he adds, it is not a greater mystery “than the transformations of physical forces into each other.”

Dr. Maudsley, a distinguished writer of the same school, says, “Few, if any, will now be found to deny that with each display of mental power there are correlative changes in the material substratum; that every phenomenon of mind is the result, as manifest in energy, of some change, molecular, chemical, or vital, in the nervous elements of the brain.” Again, he says, “With regard to the manifold phenomena of mind; by observation of them, and abstraction from the particular, we get the general conception, or the essential idea of mind, an idea which has no more existence out of the mind, than any other abstract idea or general term. In virtue, however, of that powerful tendency in the human mind to make the reality conformable to the idea, a tendency which has been at the bottom of so much confusion in philosophy, this general conception has been converted into an objective entity, and allowed to tyrannize over the understanding. A metaphysical abstraction has been made into a spiritual entity and a complete barrier thereby interposed in the way of positive investigation.”

The passages quoted above are a fair specimen of the kind of reasoning in which scientific men frequently indulge. In the first quotation, there are two clauses presented as equivalent, which are in fact essentially different; and substituting the one for the other is just a silent and subtle begging of the question. The first says that every mental act is attended by a molecular change in the brain. The other in effect says, the molecular change is the mental act. These two propositions are as different as day and night. The theory is that a certain kind of molecular motion in iron is heat; and a certain kind of molecular motion in the brain is thought. And all the proof, as far as the latter is concerned, is that the one attends the other. But the formation of an image on the retina attends sight, and yet does not prove that the image is our consciousness when we see.

Again, in the second passage, Dr. Maudsley says that “mind is an abstract idea,” which has no existence outside “of the mind,” i.e., outside of itself. An abstract idea has an abstract idea, which it makes into an objective entity. Men who deny the objective existence of mind, can no more think, speak, or write without recognizing its existence, than an idealist can act without recognizing the existence of the external world. Any theory which involves a denial of the laws of our nature is of necessity absurd.

The German Physicists.

As might be expected, the scientific men of the continent are more outspoken in their Materialism than those of England. A late German writer, Th. Otto Berger, Oberlehrer fur Mathematik and Physik, says: Materialism is the philosophy of the five senses, it admits nothing but on the testimony of sensation, and therefore denies the existence of the soul, of God, and of everything supersensuous. In its modern form, it teaches that as the material is alone true and real, it is uncreated and eternal. It always has been and always will be. It is indestructible, and, in its elements, unchangeable. Force is inseparable from matter. According to the theory no matter is without force, and no force is without matter. No force exists of itself; and, therefore, there is none to which the creation of matter is to be referred. The universe as it now is, is due to the gradual evolution of the two elements, matter and force; which evolution proceeds under the operation of fixed laws. The lower organisms are first formed; then the higher, until man appears. All life, whether animal, vegetable, or spiritual, is due to the working of physical and chemical forces in matter. As no power exists but in matter, there can be no divine Being with creative power nor any created human soul. Berger quotes Virchow as saying, “The scientific naturalist knows only bodies and the properties of bodies.” All that is beyond them he pronounces “transcendental, and the transcendental is the chimerical.” He also quotes B. C. Vogt, as saying, “We admit of no creator, either in the beginning, or in the course of the world's history; and regard the idea of a self-conscious, extramundane creator as ridiculous.” Man, according to these writers, consists only of a material body; all mental acts and states are of the brain. When the body dies, the man ceases to exist. “The only immortality,” says Moleschott, “is, that when the body is disintegrated, its ammonia, carbonic acid, and lime, serve to enrich the earth, and to nourish plants, which feed other generations of men.”

F. Refutation.

As Materialism, in its modern form, in all that is essential to the theory, is the same that it was a thousand years ago, the old arguments against it are as available now as they ever were. Its fundamental affirmation is, that all the phenomena of the universe, physical, vital, and mental, are to be referred to unintelligent physical forces; and its fundamental negation is, that there is no such objective entity as mind or spirit. If, therefore, it can be shown that unintelligent force cannot account for all the phenomena of the universe; and that there is such an objective entity or substance, as mind, the theory is refuted. There are two methods of combating any given theory. The one is the scientific, which calls in question the accuracy or the completeness of the data on which it is founded, or the validity of the inferences deduced from them. The other is the shorter and easier method of the reductio ad absurdum. The latter is just as legitimate and valid as the former. It is to be remembered that every theory includes two factors; facts and principles; or, facts and inferences drawn from them. The facts may be admitted, when the principles or inferences may be denied. Thus the facts on which Materialists insist may, for the most part at least, be acknowledged; while the sweeping inferences which they draw from them, in the eye of reason may not be worth a straw. All such inferences must be rejected whenever they conflict with any well-established truth, whether of intuition, experience, or of divine revelation.

Three general theories have been proposed to solve the great problem of the universe: the Materialistic, the Pantheistic, and the Theistic. According to the first all the phenomena of the universe are due to matter and its forces; according to the second, in its most rational form, all power, activity, and life, are the power, activity, and life of the one universal mind. The third, or Theistic theory, assumes the existence of an infinite, extramundane God, who created matter, endowed with forces, and finite minds gifted with intelligence and will; and that all the ordinary phenomena of the universe are proximately due to these physical and mental forces as constantly upheld and controlled by the omnipresent wisdom and power of God. It may be doubted whether any amount of argument can deepen the conviction that the Theistic solution of this great problem is the true one. It is seen to be true, because it is seen to be a solution. It satisfactorily accounts for all the facts of consciousness and observation. It satisfies the reason, the heart, and the conscience. It is in fact self-evidently true, in the sense that no man to whom it has been once proposed, can ever permanently shake off the conviction of its truth. The other theories are not solutions. They may account for some classes of facts, but not for others. Our present concern, however, is with Materialism.

Materialism contradicts the Facts of Consciousness.

1. The primary principle of all knowledge is the knowledge of self. This must be assumed. Unless we are we cannot know. This knowledge of self is a knowledge that we are something; a real existence; not merely a state or mode of something else; but that the self is a substance, a real, objective entity. It is, moreover, a knowledge not only that we are a substance, but also that we are an individual subsistence, which thinks, feels, and wills. Here, then, is mind, i.e., an individual, intelligent, voluntary agent, necessarily included in the first, and the most essential of all truths. If this be denied, then Hume is right, and we can know nothing. It is, moreover, included in this knowledge of the Self, that the body is not the Ego. Although the body is intimately, and even vitally united to the substance in which our personality resides, it is nevertheless objective to it. It is the organ which the Self uses, and by which it holds communion with the external world. That these are really facts of consciousness, and not merely dicta, or arbitrary assumptions, is clear because they are universally and of necessity recognized. They are imbedded in all human languages; they are involved in all expressions of human thought; they are of necessity assumed by those who theoretically deny them. The Materialist cannot think, or speak, or write, without assuming the existence of mind as distinct from matter, any more than the Idealist can live and act without assuming the existence of the external world.

Our knowledge of mind, therefore, as a thinking substance, is the first, and most certain, and the most indestructible of all forms of knowledge; because it is involved in self-knowledge, or self-consciousness, which is the indispensable condition of all knowledge. That which knows is, in the order of nature, before that which is known. It is impossible, therefore, that the Materialist can have any higher evidence of the existence of matter, or of force, than that which every man has, in his own consciousness, of the existence of mind. To deny the one is as unreasonable as to deny the other. Neither can be denied, except theoretically. As a matter of fact, every man believes in matter, and every man believes in mind. What are our sensations which are relied upon so confidently to give us knowledge of physical phenomena, but states of consciousness? If consciousness is to be trusted in reporting the testimony of the senses, why is it not to be trusted when it reports the facts of our interior life? If it is believed when it says there is something visible and tangible without us, why should it not be believed when it says there is something which thinks and wills within us? If unreliable in the one case, it is unreliable in the other; and if unreliable in either, the whole foundation of knowledge and of all faith is swept away. Confidence in the veracity of consciousness is our only security from the wildest, the most irrational, and the most degrading skepticism.

It may be said, however, that the Materialist does not deny that there is something within us that thinks and wills. He only says that that something is the brain. This, however, is to ignore one half of the testimony which consciousness really bears. It testifies not only that there are such sensations as those of sight and touch, but that there is a real objective substance which is tangible and visible. That is to say, we believe in virtue of the constitution of our nature, and therefore of necessity, when we see or touch, that the objects of our sense-perceptions have a real, objective existence. This every man believes, and cannot help believing. And in like manner, when he thinks, feels, or wills, he believes, in virtue of the constitution of his nature, and therefore by a like necessity, that he himself is an intelligent, feeling, and voluntary substance. That is, he believes that the Self is mind, or spirit, to which the body is objective, and therefore different front the Self. The belief in mind, therefore, is involved in the belief of self-existence. Consciousness gives us the assurance that the Self is an intelligent, voluntary agent, or spirit.

2. Another fact of consciousness which Materialism denies, either avowedly or by necessary implication, is the fact of free agency. This, indeed, is involved in what has already been said. Nevertheless there are those who admit the existence of mind who deny that man is a free agent. It needs no proof that consciousness attests that men have the power of self-determination. Every man knows this to be true with regard to himself. Every man recognizes the fact with regard to his fellow-men. This again is a conviction which no obduracy of the conscience, and no sophistry of argument can permanently obliterate from the human mind. This, however, Materialism denies. Physical forces act necessarily and uniformly. In referring all mental action to physical forces, Materialism cannot but exclude all freedom of action. There is no spontaneity in chemical affinity, in light, heat, or electricity; yet to these forces all vital and mental phenomena are referred. If thought be a certain kind of molecular motion of the brain, it is no more free than that other kind of molecular motion called heat. And this is the more obviously true, if they are correlative, the one being changed into the other. Accordingly Materialists, as a general thing, are avowed necessitarians. This is not only true of the Positivists, but the doctrine that human action is determined by necessary laws, is the foundation of their whole system of Social Science. And Professor Huxley, as we have seen, pronounces a spontaneous act, from the nature of the case, an absurdity. It is for him a causeless effect. Every man, therefore, who knows that he is a free agent, knows that Materialism cannot be true.

3. Materialism contradicts the facts of our moral and religious Consciousness. Our moral perceptions are the clearest, the most certain, and the most authoritative of all of our cognitions. If a man is shut up to deny either the testimony of his senses or the truths of reason, on the one hand, or the testimony of his moral nature on the other, all experience shows that he will give up sense and reason, and bow to the authority of conscience. He cannot help it. No man can free himself from the sense of sin, or of accountability. These moral convictions involve in them, or, at least, necessitate the belief in a God to whom we must give an account. But Materialism, in banishing all mind in man, leaves nothing to be accountable; and in banishing all mind from the universe, leaves no Being to whom an account can be rendered. To substitute for an intelligent, extramundane, personal God, mere “inscrutable force,” is a mockery, an insult. Our whole moral and religious nature declares any such theory to be false. It cannot be true unless our whole nature be a lie. And our nature cannot be a lie, unless, as Sir William Hamilton says, the whole universe be “a dream of a dream.” To call upon men to worship gravitation, and sing hallelujahs to the whirlwind, is to call upon them to derationalize themselves. The attempt is as idle as it is foolish and wicked.

This argument from the facts of consciousness against Materialism, is met by the assertion that consciousness is not to be trusted. Dr. Maudsley devotes the greater part of the first chapter of his book on the “Physiology of the Mind,” to the establishment of this point. He argues that self-consciousness is unreliable in the information which it does give, and incompetent to give any account of a large part of our mental activity. lt gives no account of the mental phenomena of the infant, of the uncultivated adult, and of the insane; no account of the bodily conditions which underlie every mental manifestation; no account of the large field of unconscious mental action exhibited, not only in the unconscious assimilation of impressions, but in the registrations of ideas and of their associations, in their latent existence and influence when not active, and their recall into activity; and no account of the influence organically exerted on the brain by other organs of the body. That is, consciousness does not tell us all things, and sometimes tells us wrong. Cannot the same be said of the senses? Can they inform us of everything which goes on in the body? Do they not often deceive us? Are not the sensations of the delirious and the maniac altogether untrustworthy? Does it follow from this that our senses are never to be relied upon? What then becomes of the physical sciences, which are founded on the trustworthiness of the senses. The fact is that if the testimony of consciousness is not to be received as to our mental operations, it cannot be received as to our sensations. If we have no trustworthy evidence of the existence of mind, we have no valid evidence of the existence of matter; and there is no universe, no God. All is nothing.

Happily men cannot emancipate themselves from the laws of their nature. They cannot help believing the well-attested testimony of their senses, and they cannot help believing the testimony of consciousness as to their personal identity, and as to the real, objective existence of the soul as the subject of their thoughts, feelings, and volitions. As no man can refuse to believe that he has a body, so no man can refuse to believe that he has a soul, and that the two are distinct as the Self and the Not-Self.

Materialism contradicts the Truths of Reason.

1. It is intuitively true that every effect must have a cause. This does not mean merely that every effect must have an antecedent; or, as Hume says, that anything may be the cause of anything. Nor does it mean merely that every effect must have an efficient cause. But it means that the antecedent or cause of every effect must have that kind and degree of efficiency which will rationally account for the effect.

There are two general classes of effects with which we are familiar, and which are specifically different, and therefore must have specifically different causes. The one class consists of effects which do not, the other of those which do indicate design. In the latter we see evidence of a purpose, of foresight, of provision for the future, of adaptation, of choice, of spontaneity, as well as of power. In the former all these indications are absent. We see around us innumerable effects belonging to each of these classes. We see water constantly flowing from a higher to a lower level; vapor constantly ascending from the sea; heat producing expansion, cord contraction, water extinguishing fire, alkalies correcting acidity, etc., etc. On the other hand, the world is crowded with works of human intelligence; with statues, pictures, houses, ships, complicated machines for different purposes, with books, libraries, hospitals prepared for the wants of the sick, with institutions of learning, etc., etc. No man can help believing that these classes of effects are specifically different, nor can he help believing that they are due to causes specifically different. In other words, it is self-evident that an unintelligent cause cannot produce an intelligent effect; it cannot purpose, foresee, organize, or choose. Professor Joule may determine through what space a weight must fall to produce a given amount of heat; but can he tell how far it must fall to write a poem, or produce a Madonna? Such a cause has no tendency to produce such an effect. And to suppose it to operate from eternity, is only to multiply eternally, nothing by nothing, it is nothing still.

If every man recognizes the absurdity of referring all the works of human ingenuity and intellect to unintelligent, physical force, how much greater is the absurdity of referring to blind force the immeasurably more stupendous, complicated, and ordered works of God, everywhere indicative of purpose, foresight, and choice. Of this absurdity Materialism is guilty. It teaches, in its modern form, that to carbonic acid, water, and ammonia, with the molecular forces they contain, is the causal efficiency to which all organisms from the fungus to man, and all vital and mental phenomena, are to be referred. This is the doctrine elaborately proposed and defended in Professor Huxley's paper on the “Physical Basis of Life.” That paper is devoted to establishing two propositions. The first is, “That all animal and vegetable organisms are essentially alike in power, in form, and in substance; and the second, That all vital and intellectual functions are the properties of the molecular dispositions and changes of the material basis (protoplasm) of which the various animals and vegetables consist.” He even intimates, after referring to a clock which marks the time, and the phases of the moon, as an illustration of the vital and intellectual phenomena of the universe, as produced by molecular motions and combinations, “that the existing world lay potentially in the cosmic vapor; and that a sufficient intelligence could, from a knowledge of the properties of the molecules of that vapor, have predicted, say the state of the Fauna of Britain in 1869, with as much certainty as one can say what will happen to the vapor of the breath in a cold winters day.” On this it is obvious to remark, in the first place, that it is not one whit in advance of the theory of Epicurus propounded more than two thousand years ago. As the whole mass of thinking men have turned their backs on that theory from that day to this, it is not probable that the reassertion of it, however confidently made, will have much effect upon men who have either heads or hearts. In the second place, it gives no rational account of the origin of the universe, and of the wonders which it contains. It violates the fundamental intuitive truth that every effect must have an adequate cause, inasmuch as it refers intelligent effects to unintelligent causes; all the libraries in the world, for example, to “the properties of the molecules,” of carbonic acid, water, and ammonia.

2. A second truth of Reason which Materialism contradicts is that an infinite succession of effects is as unthinkable as a self-supporting chain of an infinite number of links. The modern doctrine is that lifeless matter never becomes living except when brought into contact with previous living matter. It is the office of the living plant to take up the dead elements of the inorganic world and imbue them with life. The plant, therefore, must either precede protoplasm, which is impossible, as it is composed of protoplasm; or the protoplasm must precede the plant, which is equally impossible, because the plant alone, in the first instance, can make protoplasm; or there must be an infinite succession. That is, an infinite number of causeless effects, which is no less impossible. The doctrine of spontaneous generation, or of life originating out of dead matter, is repudiated by the most advanced advocates of the modern form of Materialism. Professor Huxley has done the cause of truth good service by his able refutation of that doctrine. Whatever may be the ultimate decision of the question as to the origin of life, it is enough for the present that the modern advocates of Materialism admit that living matter can only come from matter already alive. This admission, it is now urged, is fatal to their theory, as it necessitates the assumption of an eternal effect. If dead matter can only be made alive by previous living matter, there must be a source of life outside of matter, or life never could have begun.