Some people say, "How can you live without knowing?" I do not know what they mean. I always live without knowing. That is easy. How you get to know is what I want to know.

The inside of a computer is as dumb as hell but it goes like mad!

If you can find any other view of the world which agrees over the entire range where things have already been observed, but disagrees somewhere else, you have made a great discovery.

We absolutely must leave room for doubt or there is no progress and no learning. There is no learning without having to pose a question. And a question requires doubt. People search for certainty. But there is no certainty.

If you don't like it, go somewhere else, to another universe where the rules are simpler.

Work as hard and as much as you want to on the things you like to do the best.

We can deduce, often, from one part of physics like the law of gravitation, a principle which turns out to be much more valid than the derivation.