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.

Science and religion are, of course, two different ways of looking at the universe; and it's the same universe with two different windows.

We must be careful not to discourage our twelve-year-olds by making them waste the best years of their lives preparing for examinations.

If the tools are bad, nature's voice is muffled. If the tools are good, nature will give us a clear answer to a clear question.

The analogies between science and art are very good as long as you are talking about the creation and the performance. The creation is certainly very analogous. The aesthetic pleasure of the craftsmanship of performance is also very strong in science.

The fact that the climate is getting warmer doesn't scare me at all. There's no reason why one should be scared.

The universe in some sense must have known that we were coming.