The stones tear like flesh, rather than breaking. Although what happens is violent, it is a violence that is in stone. A tear is more unnerving than a break.

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.

I've laid down in dried up streambeds, leaving a shadow. And then, five minutes later, it's flash flooded, and where I once laid is now running water, which would've washed me away, you know? There's that power and danger often in places that look so calm and pastoral to begin with.

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

The photography is not the aim of the work; the articulation of the work through photography is another way of understanding what's going on and what's happening outside.

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.

I have worked with this red all over the world - in Japan, California, France, Britain, Australia - a vein running round the earth. It has taught me about the flow, energy and life that connects one place with another.