We are entering an increasingly dangerous period of our history. But I'm an optimist.

Humanities deepest desire for knowledge is justification enough for continuing our quest. and our goal is nothing less than a complete description of the universe we live in.

People won't have time for you if you are always angry or complaining.

What you have told us is rubbish. The world is really a flat plate supported on the back of a giant tortoise.

I don't believe that the ultimate theory will come by steady work along existing lines. We need something new. We can't predict what that will be or when we will find it because if we knew that, we would have found it already!

It is all right to make mistakes; nothing is perfect because with perfection, we would not exist.

I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first.