We often forget that we are nature.

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

When I do the permanent projects or the big projects, when a work is finished, that's the beginning of its life.

At its most successful, my 'touch' looks into the heart of nature; most days I don't even get close. These things are all part of a transient process that I cannot understand unless my touch is also transient - only in this way can the cycle remain unbroken and the process be complete.

The main source of my income is through the commissions of the large-scale works and big sculptures, the projects.

I have to understand the nature of change. And I cannot just work with stone or the more permanent materials. I need to work with leaves and ice and snow and mud and clay and water and the rising tide and the wind and all these.

If you repeat something, it can become pointless. Some things can repeat and be endlessly fascinating.