If you thought that science was certain - well, that is just an error on your part.

If it disagrees with experiment, it's wrong.

When a scientist doesn't know the answer to a problem, he is ignorant. When he has a hunch as to what the result is, he is uncertain. And when he is pretty darn sure of what the result is going to be, he is in some doubt.

We have this terrible struggle to try to explain things to people who have no reason to want to know.

Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn't matter.

You can always recognize truth by its beauty and simplicity.

To those who do not know mathematics it is difficult to get across a real feeling as to the beauty, the deepest beauty, of nature ... If you want to learn about nature, to appreciate nature, it is necessary to understand the language that she speaks in.