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

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.

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.

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

In what world did you think you could get away with this?" Jalal seethed. "To my cousin? To my family?" His gleaming hilt continued its punishing onslaught.

Three boys. Three deaths. One school. We've made the national news. Is out school cursed? Are we a reckless bunch of fools? The media asks questions no one can answer. Kids can't stop crying.

More and more you empty your mind, more and more you come closer to the spirit in the body.

In the evenings she got on her knees and inflicted her piety on her sister:

You don't look out there for God, something in the sky, you look in you.

If you eat well, you can transform your life.

Mrs Thatcher tells us she has given the French President a piece of her mind... not a gift I would receive with alacrity.

A recursive definition does not necessarily lead to a recursive process.

If you want to make a difference in America, you need to be prepared for a very long, very frustrating slog.

Responding to a question about remarks attributed to him that he did not think were his: "I really didn't say everything I said."