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.
CARL SAGANExcept in pure mathematics, nothing is known for certain (although much is certainly false).
More Carl Sagan Quotes
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You have to know the past to understand the present.
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We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.
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Books permit us to voyage through time, to tap the wisdom of our ancestors.
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Human beings have a demonstrated talent for self-deception when their emotions are stirred.
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Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.
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To live in the hearts we leave behind is to live forever.
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We can’t help it. Life looks for life.
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We are like butterflies who flutter for a day and think it is forever.
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Understanding is a kind of ecstasy.
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I would suggest that science is, at least in my part, informed worship.
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Any faith that admires truth, that strives to know God, must be brave enough to accommodate the universe.
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Somewhere, something incredible is waiting to be known.
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One glance at a book and you hear the voice of another person, perhaps someone dead for 1,000 years. To read is to voyage through time.
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Nature is unsentimental. Death is built in.
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All civilizations become either spacefaring or extinct.
CARL SAGAN