Revolution is something that actually starts in individual hearts.

The fundamental aspect of video is not the image, even though you can stand in amazement at what can be done electronically, how images can be manipulated and the really extraordinary creative possibilities. For me the essential basis of video is the movement - something that exists at the moment and changes in the next moment.

Now starts the hard part of actually doing it.

This has forced, really, a revolution in the way that we take care of our patients. What we've learned is how to manage pain better, we've learned to operate more efficiently and we've learned how to manage these patients in a way that we can get them home quickly -- provided, of course, they're in a safe atmosphere.

In the 1970s, a lot of critics didn't understand video. I got a lot of bad reviews. But film-makers didn't understand what we were doing, either. There were actual fistfights between film-makers and video-makers. I was witness to one.

My works really begin in a very simple way. Sometimes it's an image, and sometimes it's words I might write, like a fragment of a poem.