And that desire-the strong desire to take pictures-is important. It borders on a need, based on a habit: the habit of seeing. Whether working or not, photographers are looking, seeing, and thinking about what they see, a habit that is both a pleasure and a problem, for we seldom capture in a single photograph the full expression of what we see and feel. It is the hope that we might express ourselves fully-and the evidence that other photographers have done so-that keep us taking pictures.

I can't speak for other photographers, but the photographers who went forward strongly when the so-called "official" part of their career ended, to me, were those who had taught. Teaching enriches and enlivens one's work.

When I first went to 'National Geographic,' I thought I was the least qualified person to step through the doors. But because of my parents and the culture of continual learning they imposed on us, I later came to believe I was the most qualified person who ever worked there.

When assignments were over, photography continued. One of the primary reasons it did was that I wanted and needed to have fresh work. Also, it's very stimulating to be around non-professional photographers. They're the ones with the purest flame burning about their photography. I appreciate that.

Typically I see it with photographers who go to a place like India or Nepal, and everything's so colorful and exotic and they think, therefore, a picture's been taken.

My best work is often almost unconscious and occurs ahead of my ability to understand it.

...just like some people's instinct to photograph is triggered by vacation... assignments might be that to me and that's why I've built my life around assignments. That was the way to live the photographic life.