In the last workshop I taught, a woman flew in from Thailand. She's a medical doctor in Bangkok. I asked her in her one-on-one session where she wanted photography to be in her life.Did she want a second career? Was it about earning money? Or was it art? And she said "None of those. I want photography to be serious in my life." It would be like someone wanting music, like piano playing, to be a richer, deeper, and maybe even harder experience.

My first priority when taking pictures is to achieve clarity. A good documentary photograph transmits the information of the situation with the utmost fidelity; achieving it means understanding the nuances of lighting and composition, and also remembering to keep the lenses clean and the cameras steady.

The class that I teach is called "The Life of a Photograph." It takes up the question, of the billion photographs that were taken today, how many will have a life, and why? So the new reality has made the question more pertinent, not less pertinent.

My father taught me photography. It was his hobby, and we had a small darkroom in the fruit cellar of our basement. It was the kind of makeshift darkroom that was only dark at night.

There are a lot of ways to talk about the life of a photograph. You can talk about the afterlife of a photograph, and in the end I talk about that, with the Richard Prince picture. But mainly, what I dedicated the book to being about was how photographs begin their life, and where they begin it. And they begin it with the photographer's imagination and instinct and experience.

What I'm interested in is modern American history. I'm taken with the changes that have occurred in America in my lifetime.

As I have practiced it, photography produces pleasure by simplicity. I see something special and show it to the camera. A picture is produced. The moment is held until someone sees it. Then it is theirs.