Aviation is the branch of engineering that is least forgiving of mistakes.

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.

To achieve the impossible, you must attempt the absurd

Busyness is not a reason for not getting other things done. It is an excuse for not claiming your true priorities.

We've had a day of great drama and of humour too. The rumour mill is now taking over

Capitalism has defeated communism. It is now well on its way to defeating democracy.

Better never than late.

Participatory culture shifts the focus of literacy from one of individual expression to community involvement.

Even if there is intelligent life somewhere, which perhaps there is, I'm agnostic about it, I don't know.

I get restless easily so I always want to keep working, but I am trying to pace it as well.

One should see that all appearance is like mist and fog.

Things are only impossible until somebody does what another believes can't be done.