William Blake and his Illustrations to The Divine Comedy in Ideas of Good and Evil by William Butler Yeats.

“The errors in the handiwork of exalted spirits are as the more phantastical errors in their lives; as Coleridge’s opium cloud; as Villiers De L’Isle Adam’s candidature for the throne of Greece; as Blake’s anger against causes and purposes he but half understood; as the flickering madness an Eastern scripture would allow in august dreamers; for he who half lives in eternity endures a rending of the structures of the mind, a crucifixion of the intellectual body.” [via]