The technologies that raise the fewest ethical problems are those that work on a human scale, brightening the lives of individual people.

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.

Observe always that everything is the result of change, and get used to thinking that there is nothing Nature loves so well as to change existing forms and make new ones like them.

There is light in my soul.

I thought about how love was always the thing that did that - smashed into you, left you raw. The deeper you loved, the deeper it hurt.

A man's interest in the world is only the overflow from his interest in himself.

The trouble with travelling back later on is that you can never repeat the same experience.

I always wanted to be a performer, I didn't know exactly what kind of performer, all I knew was there were certain things that I liked. I liked movies a whole lot, and I loved music.

Smart men walked on the moon, daring men walked on the ocean floor, but wise men walk with God.

One of the characteristics of successful scientists is having courage.

We each have a moral obligation to conserve and preserve beauty in this world; there is none to waste.

As far as everyone else's opinion, I mean, if I would have thought that everyone was right, I probably wouldn't have left Compton, so I don't get too caught up on what the next person thinks.