Physics is not the most important thing. Love is.

If we will only allow that, as we progress, we remain unsure, we will leave opportunities for alternatives.

What is not surrounded by uncertainty cannot be the truth.

Mathematics is a language plus reasoning. It's like a language plus logic. Mathematics is a tool for reasoning.

The game I play is a very interesting one. It's imagination in a straightjacket, which is this: that it has to agree with the known laws of physics. ... It requires imagination to think of what's possible, and then it requires an analysis back, checking to see whether it fits, whether its allowed, according to what's known, okay?

So I have just one wish for you – the good luck to be somewhere where you are free to maintain the kind of integrity I have described, and where you do not feel forced by a need to maintain your position in the organization, or financial support, or so on, to lose your integrity. May you have that freedom.

But the real glory of science is that we can find a way of thinking such that the law is evident.