merged in one habit of reproduction, yield an idea.
Association by similarity is a fusion of impressions merging what is common in them, interchanging what is peculiar, and cancelling in the end what is incompatible; so that any excitement reaching that centre revives one generic reaction which yields the idea. These concrete generalities are actual feelings, the first terms in mental discourse, the first distinguishable particulars in knowledge, and the first bearers of names. Intellectual dominion of the conscious stream begins with the act of recognising these pervasive entities, which having character and ideal permanence can furnish common points of reference for different moments of discourse. Save for ideas no perception could have significance, or acquire that indicative force which we call knowledge. For it would refer to nothing to which another perception might also have referred; and so long as perceptions have no common reference, so long as successive moments do not enrich by their contributions the same object of thought, evidently experience, in the pregnant sense of the word, is impossible. No fund of valid ideas, no wisdom, could in that case be acquired by living.
Ideas are ideal.
Ideas, although their material is of course sensuous, are not sensations nor perceptions nor objects of any possible immediate experience: they are creatures of intelligence, goals of thought, ideal terms which cogitation and action circle about. As the centre of mass is a body, while it may by chance coincide with one or another of its atoms, is no atom itself and no material constituent of the bulk that obeys its motion, so an idea, the centre of mass of a certain mental system, is no material fragment of that system, but an ideal term of reference and signification by allegiance to which the details of consciousness first become parts of a system and of a thought. An idea is an ideal. It represents a functional relation in the diffuse existences to which it gives a name and a rational value. An idea is an expression of life, and shares with life that transitive and elusive nature which defies definition by mere enumeration of its materials. The peculiarity of life is that it lives; and thought also, when living, passes out of itself and directs itself on the ideal, on the eventual. It is an activity. Activity does not consist in velocity of change but in constancy of purpose; in the conspiracy of many moments and many processes toward one ideal harmony and one concomitant ideal result. The most rudimentary apperception, recognition, or expectation, is already a case of representative cognition, of transitive thought resting in a permanent essence. Memory is an obvious case of the same thing; for the past, in its truth, is a system of experiences in relation, a system now non-existent and never, as a system, itself experienced, yet confronted in retrospect and made the ideal object and standard for all historical thinking.
So-called abstractions complete facts.
These arrested and recognisable ideas, concretions of similars succeeding one another in time, are not abstractions; but they may come to be regarded as such after the other kind of concretions in experience, concretions of superposed perceptions in space, have become the leading objects of attention. The sensuous material for both concretions is the same; the perception which, recurring in different objects otherwise not retained in memory gives the idea of roundness, is the same perception which helps to constitute the spatial concretion called the sun. Roundness may therefore be carelessly called an abstraction from the real object "sun"; whereas the peculiar optical and muscular feelings by which the sense of roundness is constituted—probably feelings of gyration and perpetual unbroken movement—are much earlier than any solar observations; they are a self-sufficing element in experience which, by repetition in various accidental contests, has come to be recognised and named, and to be a characteristic by virtue of which more complex objects can be distinguished and defined. The idea of the sun is a much later product, and the real sun is so far from being an original datum from which roundness is abstracted, that it is an ulterior and quite ideal construction, a spatial concretion into which the logical concretion roundness enters as a prior and independent factor. Roundness may be felt in the dark, by a mere suggestion of motion, and is a complete experience in itself. When this recognisable experience happens to be associated by contiguity with other recognisable experiences of heat, light, height, and yellowness, and these various independent objects are projected into the same portion of a real space; then a concretion occurs, and these ideas being recognised in that region and finding a momentary embodiment there, become the qualities of a thing.
A conceived thing is doubly a product of mind, more a product of mind, if you will, than an idea, since ideas arise, so to speak, by the mind's inertia and conceptions of things by its activity.
Things concretions of concretions.
Ideas are mental sediment; conceived things are mental growths. A concretion in discourse occurs by repetition and mere emphasis on a datum, but a concretion in existence requires a synthesis of disparate elements and relations. An idea is nothing but a sensation apperceived and rendered cognitive, so that it envisages its own recognised character as its object and ideal: yellowness is only some sensation of yellow raised to the cognitive power and employed as the symbol for its own specific essence. It is consequently capable of entering as a term into rational discourse and of becoming the subject or predicate of propositions eternally valid. A thing, on the contrary, is discovered only when the order and grouping of such recurring essences can be observed, and when various themes and strains of experience are woven together into elaborate progressive harmonies. When consciousness first becomes cognitive it frames ideas; but when it becomes cognitive of causes, that is, when it becomes practical, it perceives things.
Ideas prior in the order of knowledge, things in the order of nature.
Concretions of qualities recurrent in time and concretions of qualities associated in existence are alike involved in daily life and inextricably ingrown into the structure of reason. In consciousness and for logic, association by similarity, with its aggregations and identifications of recurrences in time, is fundamental rather than association by contiguity and its existential syntheses; for recognition identifies similars perceived in succession, and without recognition of similars there could be no known persistence of phenomena. But physiologically and for the observer association by contiguity comes first. All instinct—without which there would be no fixity or recurrence in ideation—makes movement follow impression in an immediate way which for consciousness becomes a mere juxtaposition of sensations, a juxtaposition which it can neither explain nor avoid. Yet this juxtaposition, in which pleasure, pain, and striving are prominent factors, is the chief stimulus to attention and spreads before the mind that moving and variegated field in which it learns to make its first observations. Facts—the burdens of successive moments—are all associated by contiguity, from the first facts of perception and passion to the last facts of fate and conscience. We undergo events, we grow into character, by the subterraneous working of irrational forces that make their incalculable irruptions into life none the less wonderfully in the revelations of a man's heart to himself than in the cataclysms of the world around him. Nature's placid procedure, to which we yield so willingly in times of prosperity, is a concatenation of states which can only be understood when it is made its own standard and law. A sort of philosophy without wisdom may seek to subjugate this natural life, this blind budding of existence, to some logical or moral necessity; but this very attempt remains, perhaps, the most striking monument to that irrational fatality that rules affairs, a monument which reason itself is compelled to raise with unsuspected irony.
Aristotle's compromise.
Reliance on external perception, constant appeals to concrete fact and physical sanctions, have always led the mass of reasonable men to magnify concretions in existence and belittle concretions in discourse. They are too clever, as they feel, to mistake words for things. The most authoritative thinker on this subject, because the most mature, Aristotle himself, taught that things had reality, individuality, independence, and were the outer cause of perception, while general ideas, products of association by similarity, existed only in the mind. The public, pleased at its ability to understand this doctrine and overlooking the more incisive part of the philosopher's teaching, could go home comforted and believing that material things were primary and perfect entities, while ideas were only abstractions, effects those realities produced on our incapable minds. Aristotle, however, had a juster view of general concepts and made in the end the whole material universe gravitate around them and feel their influence, though in a metaphysical and magic fashion to which