What is not surrounded by uncertainty cannot be the truth.

If you think you understand quantum mechanics, you don't understand quantum mechanics.

Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on.

It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong.

If you can't explain something to a first year student, then you haven't really understood .

God was invented to explain mystery. God is always invented to explain those things that you do not understand.

Nature uses only the longest threads to weave her patterns, so that each small piece of her fabric reveals the organization of the entire tapestry.

My rule is, when you are unhappy, think about it. But when you're happy, don't. Why spoil it? You're probably happy for some ridiculous reason and you'd just spoil it to know it.

Religion is a culture of faith; science is a culture of doubt.

The only way to deep happiness is to do something you love to the best of your ability

Einstein was a giant. His head was in the clouds, but his feet were on the ground. But those of us who are not that tall have to choose!

Anyone can see that intending and not acting when we can is not really intending, and loving and not doing good when we can is not really loving.

There is nothing more savage than modern civilization.

By no means do I try to go out and hang out with famous people.

Old age, believe me, is a good and pleasant thing. It is true you are gently shouldered off the stage, but then you are given such a comfortable front stall as spectator.

None are deceived but they that confide.

When a man's stories are remembered, then he is immortal.

All men think that all men are mortal but themselves.

You know what I did before I married? Anything I wanted to.

God looked through eternity past and He saw you and He chose to reach out and redeem you by His own grace. It's hard to imagine that kind of love.