Insanity consists of building major structures upon foundations which do not exist.

Praised be the gods that made my spirit mad; Kept me aflame and raw to beauty's touch.

In individuals insanity is rare, but in groups, parties, nations, and epochs it is the rule.

Deliriums are dreams not rounded with a sleep.

We have to lose our minds to come to our senses.

We know that you are mad with much learning.

... I want the world to know that people like me who have returned from the half-world of mental oblivion are not forever contaminated. We have been sick.

When you look directly at an insane man, all you see is a reflection of your own knowledge that he's insane, which is not to see him at all. To see him you must see what he saw.

The finest minds, like the finest metals, dissolve the easiest.

I don't see no reason to hold it against a man because he went loony once or twice in his lifetime ...