The US Navy has several people on every ship that can navigate by the stars. They don't fool with that.

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.

If we humans are good at anything, it’s thinking we’ve got a terrific idea and going for it without acknowledging the potential consequences or our own ignorance.

I had a dream that I would be here this week, receiving something from the president, but I thought it would be the front door key.

Around and around the house the leaves fall thick, but never fast, for they come circling down with a dead lightness that is sombre and slow.

There is no global anthem, no global currency, no certificate of global citizenship. We pledge allegiance to one flag, and that flag is the American flag.

I was brought into situations God couldn't get out of, and I got out of them.

The enemies you make by taking a decided stand generally have more respect for you than the friends you make by being on the fence

You have to be respectful of pop culture, because people interpret it in the way they want.

Hardening of the hearteries is the most serious affliction besetting marriage, and warm, good-humored, approving words are the only effective preventive.

Surround yourself with great people; delegate authority; get out of the way

Magic is our birthright...and should be available to all who wish to utilize it as a tool of personal transformation.