Religion is a culture of faith; science is a culture of doub... - Richard Feynman

"We are at the very beginning of time for the human race. It is not unreasonable that we grapple with problems. But there are tens of thousands of years in the future. Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on."

"You can know the name of a bird in all the languages of the world, but when you're finished, you'll know absolutely nothing whatever about the bird... So let's look at the bird and see what it's doing -- that's what counts."

"We are trying to prove ourselves wrong as quickly as possible, because only in that way can we find progress."

"I have no responsibility to live up to what others expect of me. That's their mistake, not my failing."

"You can know the name of a bird in all the languages of the world, but when you're finished, you'll know absolutely nothing whatever about the bird... So let's look at the bird and see what it's doing -- that's what counts."