A blind man can understand nothing of colors save what he has learned by narration and hearsay.
 William James, The Varieties of Religious Experience (1902). copy citation

Context

“As there are men endowed only with the sensitive faculty who reject what is offered them in the way of objects of the pure understanding, so there are intellectual men who reject and avoid the things perceived by the prophetic faculty. A blind man can understand nothing of colors save what he has learned by narration and hearsay. Yet God [pg 405] has brought prophetism near to men in giving them all a state analogous to it in its principal characters. This state is sleep. If you were to tell a man who was himself without experience of such a phenomenon that there are people who at times swoon away so as to resemble dead men, and who” source