It's amazing how much progress there's been in China, and also India. Those are the places that really matter - they're half of the world's population. They're the places where things are enormously better now than they were 50 years ago. And I don't see anything that's going to stop that.

Ethical progress is the only cure for the damage done by scientific progress.

Science is my territory, but science fiction is the landscape of my dreams.

The great advances in science usually result from new tools rather than from new doctrines.

The more I examine the universe and study the details of its architecture, the more evidence I find that the universe in some sense must have known that we were coming.

Mathematics is really an art, not a science.

The world is just - it's wonderful when you look at all the detail. It's just amazing.