If we continue to accumulate only power and not wisdom, we will surely destroy ourselves.
CARL SAGANHuman beings have a demonstrated talent for self-deception when their emotions are stirred.
More Carl Sagan Quotes
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Nature is unsentimental. Death is built in.
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All over the world there are enormous numbers of smart, even gifted, people who harbor a passion for science.
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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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Our ancestors lived out of doors. They were as familiar with the night sky as most of us are with our favorite television programs.
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Your god is too small for my universe.
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I would suggest that science is, at least in my part, informed worship.
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We are like butterflies who flutter for a day and think it is forever.
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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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Extraordinary claims require extraordinary evidence.
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I’ve always thought an agnostic is an atheist without the courage of his convictions.
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Writing is the greatest of human inventions, binding together people, citizens of distant epochs, who never knew one another.
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All civilizations become either spacefaring or extinct.
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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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The notion that science and spirituality are somehow mutually exclusive does a disservice to both.
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The absence of evidence is not evidence of absence.
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We can’t help it. Life looks for life.
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Except in pure mathematics, nothing is known for certain (although much is certainly false).
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Advances in medicine and agriculture have saved vastly more lives than have been lost in all the wars in history.
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Understanding is a kind of ecstasy.
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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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People are not stupid. They believe things for reasons.
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If you wish to make an apple pie from scratch, you must first invent the universe.
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The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.
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We all have a thirst for wonder. It’s a deeply human quality. Science and religion are both bound up with it.
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The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.
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Every star may be a sun to someone.
CARL SAGAN