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Carl Sagan Quote - All civilizations become either spacefaring or extinct.

All civilizations become either spacefaring or extinct.

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Civilization Extinct Science Space

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Marilyn Monroe Paulo Coelho Abraham Lincoln C. S. Lewis Khalil Gibran Charlie Chaplin Gautama Buddha Isaac Newton

I consider it an extremely dangerous doctrine, because the more likely we are to assume that the solution comes from the outside, the less likely we are to solve our problems ourselves.
CARL SAGAN

Assume Come Consideration Danger Extreme Ourselves Outside Problem Solution
Avoidable human misery is more often caused not so much by stupidity as by ignorance, particularly our ignorance about ourselves.
CARL SAGAN

Avoid Cause Human Ignorance Misery Ourselves Particular Stupidity
If I finish a book a week, I will read only a few thousand books in my lifetime, about a tenth of a percent of the contents of the greatest libraries of our time. The trick is to know which books to read.
CARL SAGAN

Book Content Finish Library Lifetime Percent Reading Time Trick Week
Except in pure mathematics, nothing is known for certain (although much is certainly false).
CARL SAGAN

Certain Except False Mathematics Pure
We are a way for the cosmos to know itself.
CARL SAGAN

Cosmic Deep Science
Advances in medicine and agriculture have saved vastly more lives than have been lost in all the wars in history.
CARL SAGAN

Advance Agriculture History Live Lost Medicine Save Science Vast War
The absence of evidence is not evidence of absence.
CARL SAGAN

Absence Evidence One Liner
The universe is a pretty big place. If it’s just us, seems like an awful waste of space.
CARL SAGAN

Awful Place Pretty Science Space Universe Waste
We are all stardust.
CARL SAGAN

One Liner Stardust
I’ve always thought an agnostic is an atheist without the courage of his convictions.
CARL SAGAN

Atheist Conviction Courage
The very act of understanding is a celebration of joining, merging, even if on a very modest scale, with the magnificence of the Cosmos.
CARL SAGAN

Act Celebration Cosmic Magnificant Merge Modest Scale Understand
When we look up at night and view the stars, everything we see is shinning because of distant nuclear fusion.
CARL SAGAN

Distant Fusion Look Night Nuclear Science Shine Stars
Understanding is a kind of ecstasy.
CARL SAGAN

Ecstasy Kind One Liner Understand
Extraordinary claims require extraordinary evidence.
CARL SAGAN

Claim Evidence Extraordinary One Liner Requirement Science
Not explaining science seems to me perverse. When you’re in love, you want to tell the world.
CARL SAGAN

Explanation Love Peverse Science Want World
If it can be destroyed by the truth, it deserves to be destroyed by the truth.
CARL SAGAN

Deserve Destroy Justice Science Truth

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