Carl Sagan

Man is a transitional animal. He is not the climax of creation.

Carl Sagan

Man is the matter of the cosmos, contemplating itself.

Carl Sagan

My wonder button is being pushed all the time.

Carl Sagan

No other planet in the solar system is a suitable home for human beings; it’s this world or nothing. That’s a very powerful perception.

Carl Sagan

Nothing disturbs me more than the glorification of stupidity.

Carl Sagan

Our concern for the future can be tested by how well we support our libraries.

Carl Sagan

Our loyalties are to the species and the planet. We speak for Earth.

Carl Sagan

Perhaps the depth of love can be calibrated by the number of different selves that are actively involved in a given relationship.

Carl Sagan

Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out.

Carl Sagan

Real patriots ask questions.

Carl Sagan