Well germ warfare of course exists. There have been on a small scale... There have been, of course, a few people who got killed with anthrax right here in Princeton.

You ask: what is the meaning or purpose of life? I can only answer with another question: do you think we are wise enough to read God's mind?

The greatest unsolved mysteries are the mysteries of our existence as conscious beings in a small corner of a vast universe.

If you want to have a program for moving out into the universe, you have to think in centuries not in decades.

A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering.

Technology must be guided and driven by ethics if it is to do more than provide new toys for the rich.

The idea that global warming is the most important problem facing the world is total nonsense and is doing a lot of harm.

Unfortunately the global warming hysteria, as I see it, is driven by politics more than by science.

In the end it is how you fight, as much as why you fight, that makes your cause good or bad.

So long as you have courage and a sense of humor, it is never too late to start life afresh.

Technology is a gift of God. After the gift of life it is perhaps the greatest of God's gifts. It is the mother of civilizations, of arts and of sciences.

Choices are powerful things. In fact, they're more powerful than most things.

The richest source of creation is feeling, followed by a vision of its meaning.

A time comes when you don't have to use meditation techniques anymore. You just sit down and you are nonexistence itself.

The first thing baseball wants to do is make you a superstar and then say that you owe baseball something. I don't owe baseball anything. Baseball owes me.

My name became a brand and I'd love to say it was the plan from the start. But the only plan was to keep writing books. And I've stuck to that ever since.

The last thing you want to do when you are about to film a scene is think, 'Oh my God, so many people are going to watch this.

Some folks seem to have descended from the chimpanzee much later than others.

History is our guide, and without a knowledge of history, we are lost!

I tend to put my foot in my mouth. I'm not good at being diplomatic. I tend to piss people off.

To the body and mind which have been cramped by noxious work or company, nature is medicinal and restores their tone.