Out of time we cut 'days' and 'nights', 'summers' and 'winters.' We say what, each part of the sensible continuum is, and all these abstract whats are concepts. The intelletual life of man consists almost wholly in his substitution of a conceptual order for the persceptual order in which his experience originally comes.
William JamesAny object not interesting in itself may become interesting through becoming associated with an object in which an interest already exists. The two associated objects grow, as it were, together; the interesting portion sheds its quality over the whole; and thus things not interesting in their own right borrow an interest which becomes as real and as strong as that of any natively interesting thing.
William James