Because each photograph is only a fragment, its moral and emotional weight depends on where it is inserted. A photograph changes according to the context in which it is seen: thus Smith's Minamata photographs will seem different on a contact sheet, in a gallery, in a political demonstration, in a police file, in a photographic magazine, in a book, on a living-room wall. Each o these situations suggest a different use for the photographs but none can secure their meaning.

Al forms of consensus about ''great'' books and ''perennial'' problems, once stabilized, tend to deteriorate eventually into something philistine. The real life of the mind is always at the frontiers of ''what is already known.'' Those great books don't only need custodians and transmitters. To stay alive, they also need adversaries. The most interesting ideas are heresies.

A way of certifying experience, taking photographs is also a way of refusing it - by limiting experience to a search for the photogenic, by converting experience into an image, a souvenir. Travel becomes a strategy for accumulating photographs.

I don't want to express alienation. It isn't what I feel. I'm interested in various kinds of passionate engagement. All my work says be serious, be passionate, wake up.

No 'we' should be taken for granted when the subject is looking at other people's pain.

What interests me is to understand the nature of the modern.

Chris Marker has a brilliant mind and heart and appetite for life, and it's a privilege to travel with him to whatever he chooses to remember and to evoke. He is one of cinema's all time greats - the most important reflective or non-narrative filmmaker after Dziga Vertov.