This is an excellent DFW article, not just about him but even more from him about the nature of writing and its mission in the modern era:

You teach the reader that he’s way smarter than he thought he was. I think one of the insidious lessons about TV is the meta-lesson that you’re dumb. This is all you can do. This is easy, and you’re the sort of person who really just wants to sit in a chair and have it easy. When in fact there are parts of us…that are a lot more ambitious than that. And what we need, I think—and I’m not saying I’m the person to do it…is serious engaged art, that can teach again that we’re smart.