If you're an adult and you choose not to believe in science, fine, but please don't prevent your children from learning about it and letting them draw their own conclusions.

Everyone you will ever meet knows something you don't.

We are just a speck, on a speck, orbiting a speck, in the corner of a speck, in the middle of nowhere.

To leave the world better than you found it, sometimes you have to pick up other people's trash.

Science is the best idea humans have ever had. The more people who embrace that idea, the better.

You and I are made of stardust. We are the stuff of exploded stars. We are therefore, at least 1 way that the Universe knows itself. That, to me, is astonishing.

There's nothing I believe in more strongly than getting young people interested in science and engineering, for a better tomorrow, for all humankind.

I speak with dogs frequently. They don't really talk, but I feel they're communicating.

The natural world is a package deal; you don't get to select which facts you like and which you don't.

The more you find out about the world, the more opportunities there are to laugh at it.

Science is the best thing humans beings have ever come up with. And if it isn't, science will fix it.

An atheist waving a cross at a vampire was a truly pitiful sight.

There never was such beauty in another man. Nature made him and then broke the mould.

The ideal citizen of a tyrannical state is the man or woman who bows in silent obedience in exchange for the status of a well-cared-for herd animal. Thinking people become the tyrants' worst enemies.

I had always felt that mittens were a few steps back on the evolutionary scale-- why, I wondered, would we want to make ourselves into a less agile version of lobster.

Short on money, long on hope

The fact that ticket prices are way too expensive, and there's only one bunch of people going to see Broadway shows, is something I've never liked.

You can mix in certain sensitivities as a filmmaker.

I have a dream: One day we will get to the promised land. Then the president will be me, The government will be Shabaam, Mos and Kweli...that's it! All wackness is now banned.

When there’s something in the Word of God that I don’t like, the problem is not with the Word of God, it’s with me.

Donate to the extent that you don't have food for yourself after feeding the needy.