A painter without hands who wished to express in song the picture before his mind would, by means of this substitution of spheres, still reveal more about the essence of things than does the empirical world.

Madness is not a consequence of uncertainty but of certainty.

What can everyone do? Praise and blame. This is human virtue, this is human madness.

Insanity in individuals is something rare - but in groups, parties, nations and epochs, it is the rule.

I've been in pain, hope it doesn't show. I've been insane, well the time is slow.

Almost everyone who has had an idea that's somewhat revolutionary or wildly successful was first told they're insane.