A good scientific theory should be explicable to a barmaid.

All of physics is either impossible or trivial. It is impossible until you understand it, and then it becomes trivial.

Never say, "I tried it once and it did not work."

A theory that you can't explain to a bartender is probably no damn good.

We haven't got the money, so we've got to think.

An alleged scientific discovery has no merit unless it can be explained to a barmaid.

It was almost as incredible as if you fired a 15-inch shell at a piece of tissue paper and it came back and hit you.

If your experiment needs statistics, you ought to have done a better experiment.

The only possible conclusion the social sciences can draw is: some do, some don't.

All science is either physics or stamp collecting.

I must confess it was very unexpected and I am very startled at my metamorphosis into a chemist.

A barrier is a limitation only when you perceive it as one.

Humans without humanity, A world of dread and fear for eternity.

Space is dangerous. It's what we do here. If you want to play it safe all the time, go join an insurance company.

You've never seen this country It's not the way you thought it was Look again.

Michael Lewis has the amazing ability to take complex formulas and concepts and turn them into page-turners.

A certain nervous disorder afflicting the young and inexperienced.

Have the courage of your knowledge and experience. If you have formed a conclusion from the facts and if you know your judgment is sound, act on it – even though others may hesitate or differ.

I'm always experimenting and trying different things. That's what keeps it fun and encourages growth.

I'm a strong believer in stating your position and not wavering.

You're so calm and quiet, you never say. But there are things inside you. I see them sometimes, hiding in your eyes.