I have a limited intelligence and I've used it in a particular direction.

Victory usually goes to those green enough to underestimate the monumental hurdles they are facing.

I don't like honors. I'm appreciated for the work that I did, and for people who appreciate it, and I notice that other physicists use my work. I don't need anything else. I don't think there's any sense to anything else.... I've already got the prize. The prize is the pleasure of finding the thing out, the kick in the discovery, the observation that other people use it. Those are the real things. The honors are unreal to me. I don't believe in honors... I can't stand it, it hurts me.

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.

A philosopher once said, 'It is necessary for the very existence of science that the same conditions always produce the same results.' Well, they don't!

If we want to solve a problem that we have never solved before, we must leave the door to the unknown ajar.

The principle of science, the definition, almost, is the following: The test of all knowledge is experiment. Experiment is the sole judge of scientific "truth." But what is the source of knowledge? Where do the laws that are to be tested come from? Experiment, itself, helps to produce these laws, in the sense that it gives us hints. But also needed is imagination to create from these hints the great generalizations--to guess at the wonderful, simple, but very strange patterns beneath them all, and then to experiment to check again whether we have made the right guess.