"The thing I hate the most about advertising is that it attracts all the bright, creative, and ambitious young people, leaving us mainly with the slow and self-obsessed to become our artists."

"The greatest weapon in the world is a good sense of humor."

"The world is a giant canvas, and I'm just here to paint on it."

"A wall is a very big weapon. It's one of the nastiest things you can hit someone with."

"I don't think art should be expensive. I think it should be free."