Carl Sagan

I promise to question everything my leaders tell me. I promise to use my critical faculties. I promise to develop my independence of thought. I promise to educate myself so I can make my own judgments.

Carl Sagan

I set before you two ways: You can use your technology to destroy yourselves or to carry you to the planets and the stars. It’s up to you.

Carl Sagan

I think the discomfort that some people feel in going to the monkey cages at the zoo is a warning sign.

Carl Sagan

I think the health of our civilization, the depth of our awareness about the underpinnings of our culture, and our concern for the future, can all be tested by how well we support our libraries.

Carl Sagan

I would be very ashamed of my civilization if we did not try to find out if there is life in outer space.

Carl Sagan

I would love to believe that when I die I will live again, that some thinking, feeling, remembering part of me will continue.

Carl Sagan

I would suggest that science is, at least in my part, informed worship.

Carl Sagan

I’ve always thought an agnostic is an atheist without the courage of his convictions.

Carl Sagan

If all the suns but ours collapsed tonight, how many lifetimes would it take us to realize that we were alone?

Carl Sagan

If our long-term survival is at stake, we have a basic responsibility to our species to venture to other worlds. Sailors on a becalmed sea, we sense the stirring of a breeze.

Carl Sagan