There are two different ways of looking at the universe; and it's the same universe with two different windows. The science window gives you a view of the world, and the religion window gives you a totally different view. You can't look at both of them at the same time, but they're both true.

Do not imagine that you have to know everything before you can do anything. My own best work was done when I was most ignorant.

The pain of childbirth is not remembered. It's the child that's remembered.

That's the beautiful thing about science - that it's all about things we don't understand, not just the things we do understand.

Computer models of the climate....[are] a very dubious business if you don't have good inputs.

[John Wheeler] rejuvenated general relativity; he made it an experimental subject and took it away from the mathematicians

I think it's much better to have your eyes open, but on the other hand, of course it can do harm if you tell people look, there's all these terrible things you can do and then some idiot may go ahead and do it.