Know how to solve every problem that has been solved.

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!

Lost in the darkness, a light has shine on us.

Fine. Such a stupid word really. It feels empty and weightless. It’s the kind of word you use to hide the truth.

Strange as it seems, no amount of learning can cure stupidity, and higher education positively fortifies it.

A law imposing criminal penalties on protected speech is a stark example of speech suppression.

When a man feels fear without reason, you call him to the attention of a psychiatrist; you are not so careful to protect the meaning, the nature and the dignity of love.

Once the world was pulled out from beneath your feet, did you ever get to stand on firm ground again?

Some things which are remote in space and time from a living creature, especially a human creature, may form his environment even more truly than some of the things close to him.

I was taking a nose dive somewhere between eleven and twelve because my sister had died and I was practicing something that siblings do which is follow in their footsteps and die as well.

Your security is not your job, or your bank account, or your investments, or your spouse or your parents. Your security is your ability to connect with the cosmic power that creates all things.

The method of collective punishment so far has proved effective.