All these regard the material atom as a mere centre of force, or a hypothetical cause of sensations. Matter is therefore a manifestation of force, as to the old materialism force was a property of matter. But if matter, mind and God are nothing but sensations, then the body itself is nothing but sensations. There is no body to have the sensations, and no spirit, either human or divine, to produce them. John Stuart Mill, in his Examination of Sir William Hamilton, 1:234–253, makes sensations the only original sources of knowledge. He defines matter as “a permanent possibility of sensation,”and mind as “a series of feelings aware of itself.” So Huxley calls matter “only a name for the unknown cause of the states of consciousness”; although he also declares: “If I am compelled to choose between the materialism of a man like Büchner and the idealism of Berkeley, I would have to agree with Berkeley.” He would hold to the priority of matter, and yet regard matter as wholly ideal. Since John Stuart Mill, of all the materialistic idealists, gives the most precise definitions of matter and of mind, we attempt to show the inadequacy of his treatment.
The most complete refutation of subjective idealism is that of Sir William Hamilton, in his Metaphysics, 348–372, and Theories of Sense-perception—the reply to Brown. See condensed statement of Hamilton's view, with estimate and criticism, in Porter, Human Intellect, 236–240, and on Idealism, 129, 132. Porter holds that original perception gives us simply affections of our own sensorium; as cause of these, we gain knowledge of extended externality. So Sir William Hamilton: “Sensation proper has no object but a subject-object.” But both Porter and Hamilton hold that through these sensations we know that which exists independently of our sensations. Hamilton's natural realism, however, was an exaggeration of the truth. Bowne, Introd. to Psych. Theory, 257, 258—“In Sir William Hamilton's desire to have no go-betweens in perception, he was forced to maintain that every sensation is felt where it seems to be, and hence that the mind fills out the entire body. Likewise he had to affirm that the object in vision is not the thing, but the rays of light, and even the object itself had, at last, to be brought into consciousness. Thus he reached the absurdity that the true object in perception is something of which we are totally unconscious.” Surely we cannot be immediately conscious of what is outside of consciousness. James, Psychology, 1:11—“The terminal organs are telephones, and brain-cells are the receivers at which the mind listens.” Berkeley's view is to be found in his Principles of Human Knowledge, § 18 sq. See also Presb. Rev., Apl. 1885:301–315; Journ. Spec. Philos., 1884:246–260, 383–399; Tulloch, Mod. Theories, 360, 361; Encyc. Britannica, art.: Berkeley.
There is, however, an idealism which is not open to Hamilton's objections, and to which most recent philosophers give their adhesion. It is the objective idealism of Lotze. It argues that we know nothing of the extended world except through the forces which impress our nervous organism. These forces take the form of vibrations of air or ether, and we interpret them as sound, light, or motion, according as they affect our nerves of hearing, sight, or touch. But the only force which we immediately know is that of our own wills, and we can either not understand matter at all or we must understand it as the product of a will comparable to our own. Things are simply “concreted laws of action,” or divine ideas to which permanent reality has been given by divine will. What we perceive in the normal exercise of our faculties has existence not only for us but for all intelligent beings and for God himself: in other words, our idealism is not subjective, but objective. We have seen in the previous section that atoms cannot explain the universe—they presuppose both ideas and force. We now see that this force presupposes will, and these ideas presuppose mind. But, as it still may be claimed that this mind is not self-conscious mind and that this will is not personal will, we pass in the next section to consider Idealistic Pantheism, of which these claims are characteristic. Materialistic Idealism, in truth, is but a half-way house between Materialism and Pantheism, in which no permanent lodging is to be found by the logical intelligence.
Lotze, Outlines of Metaphysics, 152—“The objectivity of our cognition consists therefore in this, that it is not a meaningless play of mere seeming; but it brings before us a world whose coherency is ordered in pursuance of the injunction of the sole Reality in the world, to wit, the Good. Our cognition thus possesses more of truth than if it copied exactly a world that has no value in itself. Although it does not comprehend in what manner all that is phenomenon is presented to the view, still it understands what is the meaning of it all; and is like to a spectator who comprehends the æsthetic significance of that which takes place on the stage of a theatre, and would gain nothing essential if he were to see besides the machinery by means of which the changes are effected on the stage.” Professor C. A. Strong: “Perception is a shadow thrown upon the mind by a thing-in-itself. The shadow is the symbol of the thing; and, as shadows are soulless and dead, physical objects may seem soulless and dead, while the reality symbolized is never so soulful and alive. Consciousness is reality. The only existence of which we can conceive is mental in its nature. All existence for consciousness is existence of consciousness. The horse's shadow accompanies him, but it does not help him to draw the cart. The brain-event is simply the mental state itself regarded from the point of view of the perception.”
Aristotle: “Substance is in its nature prior to relation” = there can be no relation without things to be related. Fichte: “Knowledge, just because it is knowledge, is not reality—it comes not first, but second.” Veitch, Knowing and Being, 216, 217, 292, 293—“Thought can do nothing, except as it is a synonym for Thinker. … Neither the finite nor the infinite consciousness, alone or together, can constitute an object external, or explain its existence. The existence of a thing logically precedes the perception of it. Perception is not creation. It is not the thinking that makes the ego, but the ego that makes the thinking.” Seth, Hegelianism and Personality: “Divine thoughts presuppose a divine Being. God's thoughts do not constitute the real world. The real force does not lie in them—it lies in the divine Being, as living, active Will.” Here was the fundamental error of Hegel, that he regarded the Universe as mere Idea, and gave little thought to the Love and the Will that constitute it. See John Fiske, Cosmic Philosophy, 1:75; 2:80; Contemp. Rev., Oct. 1872: art. on Huxley; Lowndes, Philos. Primary Beliefs, 115–143; Atwater (on Ferrier), in Princeton Rev., 1857:258, 280; Cousin, Hist. Philosophy, 2:239–343; Veitch's Hamilton, (Blackwood's Philos. Classics,) 176, 191; A. H. Strong, Philosophy and Religion, 58–74.
To this view we make the following objections:
1. Its definition of matter as a “permanent possibility of sensation” contradicts our intuitive judgment that, in knowing the phenomena of matter, we have direct knowledge of substance as underlying phenomena, as distinct from our sensations, and as external to the mind which experiences these sensations.
Bowne, Metaphysics, 432—“How the possibility of an odor and a flavor can be the cause of the yellow color of an orange is probably unknowable, except to a mind that can see that two and two may make five.” See Iverach's Philosophy of Spencer Examined, in Present Day Tracts, 5: no. 29. Martineau, Study, 1:102–112—“If external impressions are telegraphed to the brain, intelligence must receive the message at the beginning as well as deliver it at the end. … It is the external object which gives the possibility, not the possibility which gives the external object. The mind cannot make both its cognita and its cognitio. It cannot dispense with standing-ground for its own feet, or with atmosphere for its own wings.” Professor Charles A. Strong: “Kant held to things-in-themselves back of physical phenomena, as well as to things-in-themselves back of mental phenomena; he thought things-in-themselves back of physical might be identical with things-in-themselves back of mental phenomena. And since mental phenomena, on this theory, are not specimens of reality, and reality manifests itself indifferently through them and through physical phenomena, he naturally concluded that we have no ground for supposing reality to be like either—that we must