If you look back on all the teachers that you liked, I am sure you will find they were very entertaining.

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.

Suffering becomes beautiful whenever a person bears great calamities with cheerfulness.

This is neither the time nor the place, however, to ponder how often the soul, in order to be able to boast of a clean body, has burdened itself with sadness, envy, and impurity.

I was very inspired by my mother. She was a vocal teacher and sang in a band, and my first memories of her were going out with her on the local circuit.

The poetry of this one is called philosophical, of that one philological, of a third rhetorical, and so on. Which is then the poetic poetry?

When I was young I was called a rugged individualist. When I was in my fifties I was considered eccentric. Here I am doing and saying the same things I did then and I'm labeled senile.

For what I wrote that started this whole controversy, I deserved to be criticized, and I felt bad about writing it. I felt bad mainly as a writer and a thinker.

I type 40 words per minute on a normal computer with my left foot. And with two cups of coffee, I can do 53 words per minute.

The most dangerous country for the U.S. now is Pakistan. ... We haven't been this vulnerable since the British burned Washington in 1814.

Oh sleep! it is a gentle thing, Beloved from pole to pole.

I have a superstition that if I talk about plot, it's like letting sand out of a hole in the bottom of a bag.