But I think it's more that when you're young, you're invincible, you're immortal - or at least you think you are. The possibilities are limitless, you're inventing the future. Then you get older and suddenly you have a history. It's fixed. You can't change anything. I find that a bit disturbing, to be honest.

I love color. I feel it inside me. It gives me a buzz.

It's very easy to say, 'I could have done that,' after someone's done it. But I did it. You didn't. It didn't exist until I did it.

Great art - or good art - is when you look at it, experience it and it stays in your mind. I don't think conceptual art and traditional art are all that different.

I always try to make everyone mellow down, make sure everybody's happy. The people I have employed have always kind of stayed with us. A lot of people who come to work for you are artists in their own right. And they want to work for you because they want to pick something up.

But whenever I look at the question of how to live, the answer's always staring me in the face. I'm already doing it.

Art is the closest you can get to immortality, though it's a poor substitute - you're working for people not yet born - and people want it because it is brilliant. It ends up in museums anyway; the rich have to give it back to the people, it's their only option. There are no pockets in a shroud.