I find that teaching and the students keep life going, and I would never accept any position in which somebody has invented a happy situation for me where I don't have to teach. Never.

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!

Writing is a solitary business. It’s just you and your characters and a blank page you need to fill.

The tragedy of unfulfilling life is that you're already dead but no one pronounced you dead...

I am the biggest face of boxing right now. That's how I feel. I am the greatest of this era.

I've done a few special effects movies in my life, so I've gotten that out of my system.

The truth is it's fun to be up there and know that you're in your underwear. Even though I know I'm exploiting my sexuality in a certain way, it's fun! It boosts my ego.

Common sense is the genius of mankind.

I mean, shout out to the people that get dressed everyday and want to take that picture everyday. I would much rather post pictures of [my girlfriend] than of myself.

The Gospel acts without threats... it teaches us about the supreme goodwill of God towards us.

I've had some incredibly triumphal things happen in my life.

My laughter won't last forever but neither will my tears. We say this life isn't perfect. And it isn't. It isn't perfectly good. But, it also isn't perfectly bad, either.