We leave our presence in the pavement. We're walking over it, sitting on steps.

The difference between a theatre with and without an audience is enormous. There is a palpable, critical energy created by the presence of the audience.

If I had to describe my work in one word, that word would be time.

Art for me is a form of nourishment. I need the land. I need it.

I have six acres in front of my own house, which I very rarely work on. Most of the work occurs on farmers' fields around me. And I like the discipline of working on other people's land.

When I was at art school, a lot of art education is about art being a means of self-expression, and as an 18-year-old I didn't know if I had a huge amount I wanted to express. It was a big moment when I decided I wanted to shift the emphasis or the intention of my art from something I disgorged myself upon and something that actually fed me or made me see the world or understand the world.

Looking, touching, material, place and form are all inseparable from the resulting work. It is difficult to say where one stops and another begins. The energy and space around a material are as important as the energy and space within. The weather--rain, sun, snow, hail, mist, calm--is that external space made visible. When I touch a rock, I am touching and working the space around it. It is not independent of its surroundings, and the way it sits tells how it came to be there.