The moment you cheat for the sake of beauty, you know you're an artist.

I think we're in a very exciting time - visually, I think we are. I've not got a crystal ball. I'm not saying I know what the future is at all. In some ways I'm getting quite pessimistic about the future, but in other ways I think it might get better. We are moving into very big changes.

In fact, most artists want to make things a bit more difficult for themselves as they go along, to challenge themselves.

I thought using three cameras was a lot better than one, because you could see where you were going, where you'd been, and all kinds of things - more like life. I think photography has colored our vision. We're now in an area where it might break something. I think this is a time. I feel it. I don't know whether I'll be here long enough to experience it. I've no plans to leave yet.

The picture itself is a document. How do you mean? We're looking at a document. It gives you clues.

Cubism was an attack on the perspective that had been known and used for 500 years. It was the first big, big change. It confused people: they said, 'Things don't look like that!'

Anything simple always interests me.