They'll sell you thousands of greens. Veronese green and emerald green and cadmium green and any sort of green you like; but that particular green, never.

There are chemists who spend their whole lives trying to find out what's in a lump of sugar. I want to know one thing. What is color?

When I am told I am too old to do something, I try to do it right away.

Art is not chaste. Those ill prepared should be allowed no contact with art. Art is dangerous. If it is chaste, it is not art.

Good taste is the enemy of creativity.

They ought to put out the eyes of painters as they do goldfinches in order that they can sing better.

Every positive value has its price in negative terms... the genius of Einstein leads to Hiroshima.