One factor that has remained constant through all the twists and turns of the history of physical science is the decisive importance of the mathematical imagination.

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.

May you find comfort by reading and mediation on God’s word.

The only alternative to war is peace and the only road to peace is negotiations.

Women's roles are diminished for obvious reasons. It's the men whose names are on the Declaration of Independence and the Constitution, and who were generals and soldiers.

People like to say how much they like stuff, but with 'The Sunset Tree, ' people shared stories about what it meant for them. And that stuff's so humbling and amazing.

I'm reachable for people, I'm not out of their league. I'm just a normal girl.

I was wandering around as usual, in my unpleasantly populated sub-conscious.

Another crazy day where you drink the night away and forget about everything.

I think everybody gets caught up in superstitions. But I don't put much stock in them ... knock on wood.

They read all the books, but they can't find the answers.

I've always been distracted when somebody is coming after me and saying, "You're the only person who can play this part."