The category is a Grand Canyon of echoes. Somebody utters an obscenity and you hear it keep bouncing back a million times. Categories are sometimes used by a person who feels that the one he's talking to doesn't know enough about the language in which he speaks. So he uses lines, circles, and pigeonholes to help the less literate one to a better understanding.
-- Duke Ellington, "Music is my Mistress." p. 38
Neither a lofty degree of intelligence nor imagination nor both together go to the making of genius. Love, love, love, that is the soul of genius.