Progress in science is often built on wrong theories that are later corrected. It is better to be wrong than to be vague.

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.

One of the biggest favors that you can do for yourself is to accept your loved ones for who they are, and not be constantly disappointed because they are not who you think they should be.

Undeniable obsession of words that quickens my spirit.

Basically, I think you need two things to get by in this world: a sense of humor and the ability to laugh when your ego is destroyed.

My parents went crazy when they found out that I had gotten the part in 'Conversations With My Father!' I'd never given acting a thought. They were proud of me and very encouraging.

I once shook hands with Pat Boone, and my whole right side sobered up!

Each of us has great gifts, but many of us severely limit ourselves with negative attitudes about our potential.

Only when Genius is married to Science can the highest results be produced.

I was so pleased to be at university to do physics and mathematics.

It's important to accessorise. I always turn to the scarves, hats and sunglasses. But wearing too many accessories at once can look very bad.

Luckily we never injected because both of us were totally scared about needles. So that probably saved us. And the other thing that saved us was our connection was not very good.