Except in pure mathematics, nothing is known for certain (although much is certainly false).
CARL SAGANAvoidable human misery is more often caused not so much by stupidity as by ignorance, particularly our ignorance about ourselves.
More Carl Sagan Quotes
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Every star may be a sun to someone.
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All civilizations become either spacefaring or extinct.
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Be grateful everyday for the brief but magnificent opportunity that life provides.
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We are a way for the cosmos to know itself.
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Don’t judge everyone else by your own limited experience.
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Stars are phoenixes, rising from their own ashes.
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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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I would suggest that science is, at least in my part, informed worship.
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We are all stardust.
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Human beings have a demonstrated talent for self-deception when their emotions are stirred.
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Somewhere, something incredible is waiting to be known.
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Understanding is a kind of ecstasy.
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Better the hard truth, I say, than the comforting fantasy.
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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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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







