Experiment is the sole judge of the validity of any idea.

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!

We are our own worst enemy.

What we did see was that jealousy is fear: it can corrode even if quite baseless.

I've come to learn that what really matters is the relationship, the quality of the relationship.

The consciousness of the falsity of present pleasures, and the ignorance of the vanity of absent pleasures, cause inconstancy.

You need something. Not just to get through the day, but to get through the incarnation. You need to find that power, that perfect unity.

Anybody that really knew Tupac will tell you the same thing. That he was just a dude that was full of life, full of energy.

I have not given any drawn or lost games, because I thought them inadequate to the purpose of the book.

I don't think success has changed us as people at all. We are the same lunatics that we were when this band first got going. We never see ourselves as being on a higher level than our fans.

The Germans sell chemical weapons to Iran and Iraq. The wounded are then sent to Germany to be treated. Veritable human guinea pigs.

There is crisis in Europe, where Russia is the principle intriguer and player, which affects a major source of international business and flow of capital.