All civilizations become either spacefaring or extinct.
CARL SAGANArguments from authority carry little weight, authorities have made mistakes in the past. They will do so again in the future. Perhaps a better way to say it is that in science there are no authorities; at most, there are experts.
More Carl Sagan Quotes
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Don’t judge everyone else by your own limited experience.
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One of the great commandments of science is: Mistrust arguments from authority.
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We live in a vast and awesome universe in which, daily, suns are made and worlds destroyed, where humanity clings to an obscure clod of rock.
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When we look up at night and view the stars, everything we see is shinning because of distant nuclear fusion.
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A galaxy is composed of gas and dust and stars – billions upon billions of stars. Every star may be a sun to someone.
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We are star stuff harvesting sunlight.
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A book is made from a tree. It is an assemblage of flat, flexible parts (still called “leaves”) imprinted with dark pigmented squiggles.
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Books are like seeds. They can lie dormant for centuries and then flower in the most unpromising soil.
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Imagination will often carry us to worlds that never were, but without it we go nowhere.
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The universe is not required to be in perfect harmony with human ambition.
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Except in pure mathematics, nothing is known for certain (although much is certainly false).
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The truth may be puzzling. It may take some work to grapple with. It may be counterintuitive. It may contradict deeply held prejudices. It may not be consonant with what we desperately want to be true. But our preferences do not determine what’s true.
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I’ve always thought an agnostic is an atheist without the courage of his convictions.
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You have to know the past to understand the present.
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Your god is too small for my universe.
CARL SAGAN