Sometimes when I'm having a boring interview on the telephone, and I'm trying to think about something else because the questions are too boring, and I start looking around the room where I work, you know, full of books piled up to the sky, all different kinds of topics. I start calculating how many centuries would I have to live reading twenty-four hours a day every day of the week to make a dent in what I'd like to learn about things, it's pretty depressing.[...] You know, we have little bits of understanding, glimpses, a little bit of light here and there, but there's a tremendous amount of darkness, which is a challenge. I think life would be pretty boring if we understood everything. It's better if we don't understand anything... and know that we don't, that's the important part.