It is not surprising that honest and well-informed experts can disagree about facts. But beyond the disagreement about facts, there is another deeper disagreement about values.

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.

Always find opportunities to make someone smile, and to offer random acts of kindness in everyday life.

Those who consider the inessential to be essential And see the essential as inessential Don't reach the essential, Living in the field of wrong intention

Myths tell us what those like us have done, can do, should do. Without myths to lead the way, we hesitate to leap forward. Listen to the wrong myths, and we might even go back a few steps.

Quit aspiring and dreaming and start being.

I am disgrac'd impeach'd and baffled here - Pierc'd to the soul with slander's venom'd spear.

Science has brought forth this danger, but the real problem is in the minds and hearts of men.

People who enjoy waving flags don't deserve to have one.

We have now well established the fact in our own nation that one can do more work in six days, even in five, than in seven. A run-down person is an unproductive person.

To sustain hatred is a very difficult thing to do, year after year. It's exhausting.

Selfishness, eager for a heaven of enjoyment, is quite a different thing in the soul from love and purity and truth, yearning together for what is their natural element.