I began to realize that the camera sees the world differently than the human eye and that sometimes those differences can make a photograph more powerful than what you actually observed.

When I go to the mountains, I intuitively know my place in the world much better through these experiences. The more intense they are, the better I know myself, and the more I am able to challenge myself.

I think that cognitive scientists would support the view that our visual system does not directly represent what is out there in the world and that our brain constructs a lot of the imagery that we believe we are seeing.

At the heart of all photography is an urge to express our deepest personal feelings - to reveal our inner, hidden selves, to unlock the artist. Those of us who become photographers are never satisfied with just looking at someone else's expression of something that is dear to us. We must produce our own images, instead of buying postcards and photo books. We seek to make our own statements of individuality.

Theres no question that photographs communicate more instantly and powerfully than words do, but if you want to communicate a complex concept clearly, you need words, too.

I find it some of the hardest photography and the most challenging photography I've ever done. It's a real challenge to work with the natural features and the natural light.

There is no question that photography has played a major role in the environmental movement.