I've had various experiences where I've been called by Hollywood studios to look at a script or comment on various scientific ideas that they're trying to inject into a story.

Sometimes attaining the deepest familiarity with a question is our best substitute for actually having the answer.

Science is the process that takes us from confusion to understanding.

When kids look up to great scientists the way they do to great musicians and actors, civilization will jump to the next level

Exploring the unknown requires tolerating uncertainty.

We're on this planet for the briefest of moments in cosmic terms, and I want to spend that time thinking about what I consider the deepest questions.

Intelligence is the ability to take in information from the world and to find patterns in that information that allow you to organize your perceptions and understand the external world.

I was holding [my four-year-old daughter] and I said, 'Sophia, I love you more than anything in the universe.' And she turned to me and said, 'Daddy, universe or multiverse?'

Free will is the sensation of making a choice. The sensation is real, but the choice seems illusory. Laws of physics determine the future.

All you are is a bag of particles acting out the laws of physics. That to me is pretty clear.

Physics grapples with the largest questions the universe presents. Where did the totality of reality come from? Did time have a beginning?

I'm not sure if there's one right place I'm supposed to be, he said, but I know a couple of wrong places I'd give a second try in a heartbeat.

She wondered how it would feel to be beautiful and have it taken away. How much harder would it be than never knowing what it felt like in the first place?

The only power worth a snot is the power to get up after you fall down.

Have you inspired someone today by your actions?

Never judge a book by its "spine".

To free a person from error is to give, and not to take away.

The soul may be immortal because she is fitted to rise towards that which is neither born nor dies, towards that which exists substantially, necessarily, invariably, that is to say towards God.

I don't choose. Normally it's the book that chooses me.

It's just paper - all I own is a pickup truck and a little Wal-Mart stock.

Dr. King didn't get famous giving a speech that said,"I have a complaint."