Of course, the English countryside is completely artificial. It was naturally a forest; they chopped down the trees and made it into what it is now: really a beautiful country.

Everything in my life was luck. The key to having an interesting life is to always say "yes" to anything crazy.

In the history of science it has often happened that the majority was wrong and refused to listen to a minority that later turned out to be right.

A good cause can become bad if we fight for it with means that are indiscriminately murderous. A bad cause can become good if enough people fight for it in a spirit of comradeship and self-sacrifice. In the end it is how you fight, as much as why you fight, that makes your cause good or bad.

The technologies that raise the fewest ethical problems are those that work on a human scale, brightening the lives of individual people.

The glory of science is to imagine more than we can prove.

I'm a mathematician, basically. What I do is look around for problems where I can find useful applications for mathematics. All I do, really, is the math, and other people have the ideas.