There is enough energy in a single cubic meter of space to boil all the oceans in the world.

Progress in science comes when experiments contradict theory.

I believe that a scientist looking at nonscientific problems is just as dumb as the next guy.

Tell your son to stop trying to fill your head with science - for to fill your heart with love is enough!

I find that teaching and the students keep life going, and I would never accept any position in which somebody has invented a happy situation for me where I don't have to teach. Never.

As revealed by physics, the truth is so remarkable, so amazing!

We absolutely must leave room for doubt or there is no progress and there is 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. People are terrified — how can you live and not know? It is not odd at all. You only think you know, as a matter of fact. And most of your actions are based on incomplete knowledge and you really don’t know what it is all about, or what the purpose of the world is, or know a great deal of other things. It is possible to live and not know.