I started out as a molecules kid. In high school and early college I loved chemistry, but I gradually shifted toward physics, which seemed cleaner - odorless, in fact.

Theorists write all the popular books on science: Heinz Pagels, Frank Wilczek, Stephen Hawking, Richard Feynman, et al. And why not? They have all that spare time.

Physics isn't a religion. If it were, we'd have a much easier time raising money.

The physicists defer only to mathematicians, and the mathematicians defer only to God.

I sometimes think about the tower at Pisa as the first particle accelerator, a (nearly) vertical linear accelerator that Galileo used in his studies.

Those who do not stop asking silly questions become scientists.

We hope to explain the entire universe in a single, simple formula that you can wear on your T-shirt.

Science should have no less lofty a goal. My ambition is to live to see all of physics reduced to a formula so elegant and simple that it will fit easily on the front of a T-shirt.

My children have often asked me why I never received a Nobel Prize. I used to tell them it was because the Nobel committee couldn’t make up its mind which of my projects to recognize.

I'm so old I can remember when the Dead Sea was only sick.

One of the major ingredients for professional success in science is luck. Without this, forget it.

Wolfman clears everything off the table except his gun. That he keeps close at hand. There is a sense of ceremony about his actions. My stomach tightens up. We are about to begin.

Now I know that grief is a whetstone that sharpens all your love, all your happiest memories, into blades that tear you apart from within.

We all become great explorers during our first few days in a new city, or a new love affair.

At this point we find ourselves confronted by a very disquieting question: Do we really wish to act upon our knowledge?

Are you woman enough to be my man?

Whatever you cannot understand, you cannot possess.

If you think or fear too much, you can't get far!

Controversy equalizes fools and wise men in the same way - and the fools know it.

Marriages don't last. When I meet a guy, the first question I ask myself is: is this the man I want my children to spend their weekends with?

If you look around at America, that's one of its biggest problems is you have corporations that can never be pleased at a profit.