I am now to make the pragmatic method more familiar by giving you some illustrations of its application to particular problems. I will begin with what is driest, and the first thing I shall take will be the problem of Substance. Everyone uses the old distinction between substance and attribute, enshrined as it is in the very structure of human language, in the difference between grammatical subject and predicate. Here is a bit of blackboard crayon. Its modes, attributes, properties, accidents, or affections,—use which term you will,—are whiteness, friability, cylindrical shape, insolubility in water, etc., etc. But the bearer of these attributes is so much chalk, which thereupon is called the substance in which they inhere. So the attributes of this desk inhere in the substance 'wood,' those of my coat in the substance 'wool,' and so forth. Chalk, wood and wool, show again, in spite of their differences, common properties, and in so far forth they are themselves counted as modes of a still more primal substance, matter, the attributes of which are space occupancy and impenetrability. Similarly our thoughts and feelings are affections or properties of our several souls, which are substances, but again not wholly in their own right, for they are modes of the still deeper substance 'spirit.'
Now it was very early seen that all we know of the chalk is the whiteness, friability, etc., all WE KNOW of the wood is the combustibility and fibrous structure. A group of attributes is what each substance here is known-as, they form its sole cash-value for our actual experience. The substance is in every case revealed through THEM; if we were cut off from THEM we should never suspect its existence; and if God should keep sending them to us in an unchanged order, miraculously annihilating at a certain moment the substance that supported them, we never could detect the moment, for our experiences themselves would be unaltered. Nominalists accordingly adopt the opinion that substance is a spurious idea due to our inveterate human trick of turning names into things. Phenomena come in groups—the chalk-group, the wood-group, etc.—and each group gets its name. The name we then treat as in a way supporting the group of phenomena. The low thermometer to-day, for instance, is supposed to come from something called the 'climate.' Climate is really only the name for a certain group of days, but it is treated as if it lay BEHIND the day, and in general we place the name, as if it were a being, behind the facts it is the name of. But the phenomenal properties of things, nominalists say, surely do not really inhere in names, and if not in names then they do not inhere in anything. They ADhere, or COhere, rather, WITH EACH OTHER, and the notion of a substance inaccessible to us, which we think accounts for such cohesion by supporting it, as cement might support pieces of mosaic, must be abandoned. The fact of the bare cohesion itself is all that the notion of the substance signifies. Behind that fact is nothing.
Scholasticism has taken the notion of substance from common sense and made it very technical and articulate. Few things would seem to have fewer pragmatic consequences for us than substances, cut off as we are from every contact with them. Yet in one case scholasticism has proved the importance of the substance-idea by treating it pragmatically. I refer to certain disputes about the mystery of the Eucharist. Substance here would appear to have momentous pragmatic value. Since the accidents of the wafer don't change in the Lord's supper, and yet it has become the very body of Christ, it must be that the change is in the substance solely. The bread-substance must have been withdrawn, and the divine substance substituted miraculously without altering the immediate sensible properties. But tho these don't alter, a tremendous difference has been made, no less a one than this, that we who take the sacrament, now feed upon the very substance of divinity. The substance-notion breaks into life, then, with tremendous effect, if once you allow that substances can separate from their accidents, and exchange these latter.
This is the only pragmatic application of the substance-idea with which I am acquainted; and it is obvious that it will only be treated seriously by those who already believe in the 'real presence' on independent grounds.
MATERIAL SUBSTANCE was criticized by Berkeley with such telling effect that his name has reverberated through all subsequent philosophy. Berkeley's treatment of the notion of matter is so well known as to need hardly more than a mention. So far from denying the external world which we know, Berkeley corroborated it. It was the scholastic notion of a material substance unapproachable by us, BEHIND the external world, deeper and more real than it, and needed to support it, which Berkeley maintained to be the most effective of all reducers of the external world to unreality. Abolish that substance, he said, believe that God, whom you can understand and approach, sends you the sensible world directly, and you confirm the latter and back it up by his divine authority. Berkeley's criticism of 'matter' was consequently absolutely pragmatistic. Matter is known as our sensations of colour, figure, hardness and the like. They are the cash-value of the term. The difference matter makes to us by truly being is that we then get such sensations; by not being, is that we lack them. These sensations then are its sole meaning. Berkeley doesn't deny matter, then; he simply tells us what it consists of. It is a true name for just so much in the way of sensations.
Locke, and later Hume, applied a similar pragmatic criticism to the notion of SPIRITUAL SUBSTANCE. I will only mention Locke's treatment of our 'personal identity.' He immediately reduces this notion to its pragmatic value in terms of experience. It means, he says, so much consciousness,' namely the fact that at one moment of life we remember other moments, and feel them all as parts of one and the same personal history. Rationalism had explained this practical continuity in our life by the unity of our soul-substance. But Locke says: suppose that God should take away the consciousness, should WE be any the better for having still the soul-principle? Suppose he annexed the same consciousness to different souls, | should we, as WE realize OURSELVES, be any the worse for that fact? In Locke's day the soul was chiefly a thing to be rewarded or punished. See how Locke, discussing it from this point of view, keeps the question pragmatic:
Suppose, he says, one to think himself to be the same soul that once was Nestor or Thersites. Can he think their actions his own any more than the actions of any other man that ever existed? But | let him once find himself CONSCIOUS of any of the actions of Nestor, he then finds himself the same person with Nestor. ... In this personal identity is founded all the right and justice of reward and punishment. It may be reasonable to think, no one shall be made to answer for what he knows nothing of, but shall receive his doom, his consciousness accusing or excusing. Supposing a man punished now for what he had done in another life, whereof he could be made to have no consciousness at all, what difference is there between that punishment and being created miserable?
Our personal identity, then, consists, for Locke, solely in pragmatically definable particulars. Whether, apart from these verifiable facts, it also inheres in a spiritual principle, is a merely curious speculation. Locke, compromiser that he was, passively tolerated the belief in a substantial soul behind our consciousness. But his successor Hume, and most empirical psychologists after him, have denied the soul, save as the name for verifiable cohesions in our inner life. They redescend into the stream of experience with it, and cash it into so much small-change value in the way of 'ideas' and their peculiar connexions with each other. As I said of Berkeley's matter, the soul is good or 'true' for just SO MUCH, but no more.
The mention of material substance naturally suggests the doctrine of 'materialism,' but philosophical materialism is not necessarily knit up with belief in 'matter,' as a metaphysical principle. One may deny matter in that sense, as strongly as Berkeley did, one may be a phenomenalist like Huxley, and yet one may still be a materialist in the wider sense, of explaining higher phenomena by lower ones, and leaving the destinies of the world at the mercy of its blinder parts and forces. It is in this wider sense of the word that materialism is opposed to spiritualism or theism. The laws of physical nature are what run things, materialism says. The highest productions of human genius might be ciphered by one who had complete acquaintance with the facts, out of their physiological conditions, regardless whether nature be there only for our minds, as idealists contend, or not. Our minds in any case would have to record the kind of nature it is, and write it down as operating through blind laws of physics. This is the complexion of present day materialism, which may better be called naturalism. Over against it stands 'theism,' or what in a wide sense may be termed 'spiritualism.' Spiritualism says that mind not only witnesses and records things, but also runs and operates them: the world being thus guided, not by its lower, but by its higher element.
Treated as it often is, this question becomes little more than a conflict between aesthetic preferences. Matter is gross, coarse, crass, muddy; spirit is pure, elevated, noble; and since it is more consonant with the dignity of the universe to give the primacy in it to what appears superior, spirit must be affirmed as the ruling principle. To treat abstract principles as finalities, before which our intellects may come to rest in a state of admiring contemplation, is the great rationalist failing. Spiritualism, as often held, may be simply a state of admiration for one kind, and of dislike for another kind, of abstraction. I remember a worthy spiritualist professor who always referred to materialism as the 'mud-philosophy,' and deemed it thereby refuted.