As you know, a theory in physics is not useful unless it is able to predict underlined effects which we would otherwise expect.

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!

In some rare cases, a friendship between two people benefits both of them, and what’s more, in some rarer cases, it benefits both of them equally.

May they run free forever and grow back their limbs!

If you can't explain what you are doing to a nine-year-old, then either you still don't understand it very well, or it's not all that worthwile in the first place.

We do not know a truth without knowing its cause.

When you develop yourself to the point where your belief in yourself is so strong that you know that you can accomplish anything you put your mind to, your future will be unlimited.

Healing is the application of love to the places inside that hurt.

I'm a better and more educated person because of basketball.

The single most important thing we want to achieve is for President Obama to be a one-term president.

Best way to learn how life works is to have the guts to truly go out and live it!

If I were to believe in a god l would believe in gods. I think monotheism is the really ghastly thing. That is the absolutely staggering to me misapprehension.