When a building is so complete within itself, I always think, "Why do I even have to go inside it?" I would love to do architecture that people can have a free hand in the making of it. We've done spaces where things are hinged and they can go out or in, but that's not freedom. That's supermarket freedom, or the notion that you can have anything you want as long as the supermarket carries it. We would love to do a space where you go inside and there's nothing there. You might have a seat and when you don't need it anymore you get up and it disappears.

Architecture is not about space but about time.

Why was I in a basement saying, "I'm alone here," wielding a lead pipe and crowbars? It was like I was doing the Vietnam War. It was like I was being America. If I put a blindfold on, I can't see you as people, which seemed to be what the United States was doing. I mean, it was important for people in my generation, because I grew up in the '40s, at a time when America was supposedly the hero nation. America saved Europe. And, some years later, we realized, America is a criminal.

I liked the idea of architectural games - you're always building and rebuilding. And I still thought of myself in opposition. I thought, If architects build a dream house, then I want to build a bad-dream house. My piece was called Bad Dream House.

Yes, the fear of its blankness. At the same time, I kind of loved it. Mallarmé was trying to make the page a blank page. But if you're going to make the page a blank page, it's not just the absence of something, it has to become something else. It has to be material, it has to be this thing. I wanted to turn a page into a thing.

What I never wanted in art - and why I probably didn't belong in art - was that I never wanted viewers. I think the basic condition of art is the viewer: The viewer is here, the art is there. So the viewer is in a position of desire and frustration. There were those Do Not Touch signs in a museum that are saying that the art is more expensive than the people. But I wanted users and a habitat. I don't know if I would have used those words then, but I wanted inhabitants, participants. I wanted an interaction.

I like Richard Serra sculptures too but I wish they had a goddamn hot dog stand inside.