Graffiti doesn't exist unless someone got a photo, because it's gone immediately.

After pop art, graffiti is probably the biggest art movement in recent history to have such an impact on culture.

One of the interesting things about skateboarding and graffiti is that skateboarding exists in the documentation of an act.

I believe that an art exhibition can be engaging, fun and deeply intellectually satisfying and serious. These are not contradictory concepts in art.

In the 1970s when I started in the art world, no self-respecting artist would have stood in line to try to get on a television show. It never would have happened.

There is a constant ebb and flow in art historical reputations. The reputation of even the greatest figures like Picasso are in flux.

Every day you run into artists on the streets in SoHo or other creative people you want to do something with. There's nothing to match that chance encounter.

Street culture is punk, hip-hop, skateboarding, surfing, graffiti. It's like a massive global culture that is all tied together. But for so many years it was very geographic.

When skateboarding and punk merged, it really became a large teen subculture.

Dennis Hopper is one of the great American lives.

Art dealing is when you're doing it as a business.

To love one's self is the beginning of a life-long romance.

Unless we abandon elements which resemble a police state, we can't meet the demands of being a modern society.

What are you reading for?

The desire to please those we admire and respect often cripples conscience.

While we have the gift of life, it seems to me the only tragedy is to allow part of us to die - whether it is our spirit, our creativity or our glorious uniqueness.

Water-boarding can result in damage to the lungs and the brain, as well as long-term psychological trauma.

I've forgiven all my enemies - even those who have stolen money from me.

I'm a very good packer, but I probably take too much in the way of toiletries. You only really need a toothbrush, as most places you go to have a bar of soap and some shampoo.

Three stages of truth for scientists: It's not true. If it is true, it's not very important. We knew it all along.

I never go overbudget on my movies.