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Abstract concepts, such as elasticity, voluminousness, disconnectedness, are salient aspects of our concrete experiences which we find it useful to single out. Useful, because we are then reminded of other things that offer those same aspects; and, if the aspects carry consequences in those other things, we can return to our first things, expecting those same consequences to accrue.

To be helped to anticipate consequences is always a gain, and such being the help that abstract concepts give us, it is obvious that their use is fulfilled only when we get back again into concrete particulars by their means, bearing the consequences in our minds, and enriching our notion of the original objects therewithal.

Without abstract concepts to handle our perceptual particulars by, we are like men hopping on one foot. Using concepts along with the particulars, we become bipedal. We throw our concept forward, get a foothold on the consequence, hitch our line to this, and draw our percept up, travelling thus with a hop, skip and jump over the surface of life at a vastly rapider rate than if we merely waded through the thickness of the particulars as accident rained them down upon our heads. Animals have to do this, but men raise their heads higher and breathe freely in the upper conceptual air.

The enormous esteem professed by all philosophers for the conceptual form of consciousness is easy to understand. From Plato’s time downwards it has been held to be our sole avenue to essential truth. Concepts are universal, changeless, pure; their relations are eternal; they are spiritual, while the concrete particulars which they enable us to handle are corrupted by the flesh. They are precious in themselves, then, apart from their original use, and confer new dignity upon our life.

One can find no fault with this way of feeling about concepts so long as their original function does not get swallowed up in the admiration and lost. That function is of course to enlarge mentally our momentary experiences by ADDING to them the consequences conceived; but unfortunately, that function is not only too often forgotten by philosophers in their reasonings, but is often converted into its exact opposite, and made a means of diminishing the original experience by DENYING (implicitly or explicitly) all its features save the one specially abstracted to conceive it by.

This itself is a highly abstract way of stating my complaint, and it needs to be redeemed from obscurity by showing instances of what is meant. Some beliefs very dear to my own heart have been conceived in this viciously abstract way by critics. One is the ‘will to believe,’ so called; another is the indeterminism of certain futures; a third is the notion that truth may vary with the standpoint of the man who holds it. I believe that the perverse abuse of the abstracting function has led critics to employ false arguments against these doctrines, and often has led their readers to false conclusions. I should like to try to save the situation, if possible, by a few counter-critical remarks.

Let me give the name of ‘vicious abstractionism’ to a way of using concepts which may be thus described: We conceive a concrete situation by singling out some salient or important feature in it, and classing it under that; then, instead of adding to its previous characters all the positive consequences which the new way of conceiving it may bring, we proceed to use our concept privatively; reducing the originally rich phenomenon to the naked suggestions of that name abstractly taken, treating it as a case of ‘nothing but’ that concept, and acting as if all the other characters from out of which the concept is abstracted were expunged. [Footnote: Let not the reader confound the fallacy here described with legitimately negative inferences such as those drawn in the mood ‘celarent’ of the logic-books.] Abstraction, functioning in this way, becomes a means of arrest far more than a means of advance in thought. It mutilates things; it creates difficulties and finds impossibilities; and more than half the trouble that metaphysicians and logicians give themselves over the paradoxes and dialectic puzzles of the universe may, I am convinced, be traced to this relatively simple source. THE VICIOUSLY PRIVATIVE EMPLOYMENT OF ABSTRACT CHARACTERS AND CLASS NAMES is, I am persuaded, one of the great original sins of the rationalistic mind.