We are both great men but I have succeeded better in keeping it a profound secret than he has.

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.

Writing has the power of permanence.

He exuded wisdom-even the wisest...were pale, flickering candles next to the nourishing solar illumination of [his] insights.

Have the courage to act instead of react.

I don't like to be labeled, to be anything. I've made the mistake before myself of labeling my music, but it's counter-productive.

You can tell if someone's into you. You can feel the chemistry.

The genius of America's endless war machine is that, learning from the unpleasantness of the Vietnam war protests, it has rendered the costs of war largely invisible.

So do you remember this place?" "Hard to forget." he snorted. "This is where you tried to kill me. You were so nervous, you kept blushing. Never had someone try to stake me who blushed so much.

It is not man the ecological crisis threatens to destroy but the quality of human life.

I don't believe in a government that protects us from ourselves.

The Puritan did not stop to think; he recognized God in his soul, and acted.