The world's going to change climatically. We just want to control the change. We want to have a high quality of life for billions of people as we pass through this era.

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.

The meaning of life. The wasted years of life. The poor choices of life. God answers the mess of life with one word: 'grace.

Once you know that you have a voice, ” Louis said, “it’s no longer the voice that matters, but what is behind the voice.

It's very difficult to live with religious ideas. I can't compare religion to the movies. I can fuse them.

The constant happiness is curiosity.

Dreams will be fulfilled if you want them badly enough.

Without grace no book can live, and with it the poorest may have its life prolonged.

The organizations of men, like men themselves, seem subject to deafness, near-sightedness, lameness, and involuntary cruelty. We seem tragically unable to help one another, to understand one another.

Is that the truth, Jimmy?" I ask without looking at him. "It's the truth and it come to ya!" I smile.

Do not let circumstances defeat you. You can if you think you can.

The history of a culture can be determined by its untranslatable words.