Imagination does not breed insanity. Exactly what does breed insanity is reason. Poets do not go mad; but chess players do... Perhaps the strongest case of all is this: that only one great English poet went mad, Cowper. And he was definitely driven mad by logic, by the ugly and alien logic of predestination. Poetry was not the disease, but the medicine... He was damned by John Calvin... Poetry is sane because it floats easily in an infinite sea; reason seeks to cross the infinite sea, and so make it finite. The result is mental exhaustion... The poet only asks to get his head into the heavens. It is the logician who seeks to get the heavens into his head. And it is his head that splits... The madman is not the man who has lost his reason. The madman is the man who has lost everything except his reason... Materialists and madmen never have doubts... Mysticism keeps men sane. As long as you have the mystery you have health; when you destroy mystery you create morbidity.

What a strange world in which a man cannot remain unique even by taking the trouble to go mad.

The great Gaels of Ireland are the men that God made mad,
For all their wars are merry, and all their songs are sad.