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

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.

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.

In the future, a new generation of artists will be writing genomes as fluently as Blake and Byron wrote verses.

Listen. Pay attention. Treasure every moment.

If there is anyone out there who still doubts that America is a place where all things are possible

Unless a man enters upon the vocation intended for him by nature, and best suited to his peculiar genius, he cannot succeed.

While I thought that I was learning how to live, I have been learning how to die.

I want to deal with what's in front of me now to the best of my abilities, and sometimes that's not very good. But a lot of the days it is really great.

Basketball also helps you learn to move your feet by playing defense and guarding guys, and that all carries over to playing football with staying square and having good footwork.

Well, why is this art? Why isn't that art?

[N]ature repairs one thing from another and allows nothing to be born without the aid of another's death.

But only a brief moment is granted to the brave one breath or two, whose wage is the long nights of the grave.

Christianity promises to make men free; it never promises to make them independent.