I have to keep going to find out ultimately what is the matter with it in the end.

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!

And Meredith and Bonnie, who's going to bend some spoons for us next. I'm going to throw you down a rope… that is, unless Bonnie can levitate you out.

But man is a fickle and disreputable creature and perhaps, like a chess-player, is interested in the process of attaining his goal rather than the goal itself.

The secret of life is to have no fear it's the only way to function.

Moderation is a virtue only in those who are thought to have an alternative.

If we had pursued the war on cancer which President Nixon declared in 1970, Jack Kemp might be alive today.

Through democracy we can address the basic needs of the people, involve them as participants in planning and restore the authority of the government.

Knowledge earns you power, character earns you respect.

There is a curtain, thin as gossamer, clear as glass, strong as iron, that hangs forever between the world of magic and the world that seems to us to be real.

Make time in your life to listen to your own voice. Do not let it get drowned out by others. Your voice is yours and yours alone. Stay in touch with it and use it.

Love might have expanded her. But we are not all of us going to get loved. We are not all of us going to get expanded.