There is stuff I would have liked to have done. But there are no sour grapes.

You have to do every detail on every bloody piece of the building. You have to know how the engineering works. You have to know how the fittings go together. You have to master the mechanical, electrical, acoustical - everything.

Creativity is about play and a kind of willingness to go with your intuition. It's crucial to an artist. If you know where you are going and what you are going to do, why do it? I think I learned that from the artists, from my grandmother, from all the creative people I've spent time with over the years.

There's a drive in us to express ourselves in some way or form. We pick up whatever material is available. It's primitive. Kids see sand on the beach, build something and show their parents: "Look what I did, Mama." It's necessary to us.

Well, I've always just - I've never really gone out looking for work. I always waited for it to sort of hit me on the head.

The back of Saint Peter's is one of the finest pieces of architecture I've ever seen.

That's where you have to look for your inspiration. Don't separate the rest of your life - who you are, what you love - from your work.