You stop planetary exploration, those people who do that extraordinary work are going to have to go do something else.

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.

Inspiration ends when reading ends.

A good artist does not just make imaginations beautiful to the mind, but also more pleasant to the eye with a superb visible touch of excellence.

Language, that most human invention, can enable what, in principle, should not be possible. It can allow all of us, even the congenitally blind, to see with another person’s eyes.

You can't increase prosperity by taxing success.

I took on the sins of everybody, of a generation, really.

Anger is frustration at the fact that we are not God, and do not have control over reality.

When combined with information and communication technologies, microcredit can unleash new opportunities for the world's poorest entrepreneurs and thereby revitalize the village economies they serve.

And in that sliver of time, I felt the power around me coalesce, malice-hard and sharp as crystal. That this analogy occurred to me should have been a warning.

There are many things that were harder to discuss back in the 80's and early 90's than they are now, and this also works the opposite way for other things.

Poverty wants much; but avarice, everything.