I think people care. If not, why do so many people spend money going on vacations to see architecture? They go to the Parthenon, to Chartres, to the Sydney Opera House. They go to Bilbao... Something compels them, and yet we live surrounded by everything but great architecture.

Liquid architecture. It's like jazz - you improvise, you work together, you play off each other, you make something, they make something. And I think it's a way of - for me, it's a way of trying to understand the city, and what might happen in the city.

I hate the word starchitect. Stuff like that comes from mean-spirited, untalented journalists. It's demeaning.

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.

One of my unsung heroes is Erich Mendelsohn. I met him when I was a student and he was a cranky old man and very unpleasant. But if you go to his Einstein Tower in Potsdam, Germany you see an enormous intellect at work with a language that was personal and new. It has a sense of urban design and of theater and procession I hadn't seen before.

When I start my class I ask the students to write their signatures on pieces of paper and put them on a table. I have them look at them, and I point out, "They're all different, aren't they? That's you, that's you, that's you, that's you."

Many people put a green button on their collar and feel good, just like a lot of people put an American flag on their lapels and feel patriotic. It's not enough.