The more I examine the universe and study the details of its architecture, the more evidence I find that the universe in some sense must have known that we were coming.

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.

Trust but check. Check on those we trust.

Fear of life in one form or another is the great thing to exorcise.

Could you be loved and be loved?

Sadly, the American dream is dead.

There is no better proof of a man's being truly good than his desiring to be constantly under the observation of good men.

In a country where nature has been so lavish and where we have been so spendthrift of indigenous beauty, to set aside a few rivers in their natural state should be considered an obligation.

Once you deliberately exterminate from your life those things that quench the fire of the Spirit, then He will reveal Himself again and the old flame and passion will be yours.

There is the world that should be and the world that is. We live in one and must create the other.

I told the students [at Yale] we were going to talk about love - I meant love in the sense of devotions to one's work - and about half the students got really pissed off.

The Arab and Islamic nation has lost a great man and one of its fearless men who dedicated his life to the service of the people of this nation and their aspirations.