The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.
CARL SAGANThe notion that science and spirituality are somehow mutually exclusive does a disservice to both.
More Carl Sagan Quotes
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Extraordinary claims require extraordinary evidence.
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For small creatures such as we the vastness is bearable only through love.
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I’ve always thought an agnostic is an atheist without the courage of his convictions.
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All civilizations become either spacefaring or extinct.
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The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.
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The universe is not required to be in perfect harmony with human ambition.
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If we ruin the earth, there is no place else to go.
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Arguments 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.
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We make our world significant by the courage of our questions and the depth of our answers.
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Knowing a great deal is not the same as being smart; intelligence is not information alone but also judgement, the manner in which information is coordinated and used.
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Extinction is the rule. Survival is the exception.
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There are as many atoms in one molecule of DNA as there are stars in a typical galaxy.
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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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Nature is always more subtle, more intricate, more elegant than what we are able to imagine.
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We are all stardust.
CARL SAGAN