The glory of science is to imagine more than we can prove.

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.

A dog has one aim in life... to bestow his heart.

Those for whom the world is not enough: saints, conquerors, poets, and all lovers of books.

Friendship is nothing else than an accord in all things human and divine conjoined with mutual goodwill and affection.

For actors, you've gotta sometimes fill in your backstory.

Once you embrace unpleasant news, not as a negative but as evidence of a need for change, you aren't defeated by it. You're learning from it.

How do you tell your mother that you feel you're getting... old? If I'm... old, then what is she?

Practical application is the only mordant which will set things in the memory. Study without it is gymnastics, and not work, which alone will get intellectual bread.

A wave is never found alone, but is mingled with as many other waves as there are uneven places in the object where the said wave is produced.

A poet should leave traces of his passage, not proofs. Traces alone engender dreams.