1,131 Quotes by Carl Sagan

Tsiolkovsky wrote: “The Earth is the cradle of mankind. But one does not live in the cradle forever.

It is of interest to note that while some dolphins are reported to have learned English – up to fifty words used in correct context – no human being has been reported to have learned dolphinese.

After the earth dies, some 5 billion years from now, after it’s burned to a crisp, or even swallowed by the Sun, there will be other worlds and stars and galaxies coming into being – and they will know nothing of a place once called Earth.

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

If it were widely understood that claims to knowledge require adequate evidence before they can be accepted, there would be no room for pseudoscience.

A universe that is unknowable is no fit place for a thinking being. The ideal universe for us is one very much like the universe we inhabit.

There is today-in a time when old beliefs are withering-a kind of philosophical hunger, a need to know who we are and how we got here. It is an on-going search, often unconscious, for a cosmic perspective for humanity.

Understanding is a kind of ecstasy.

You’re capable of such beautiful dreams and such horrible nightmares...