Except in pure mathematics, nothing is known for certain (although much is certainly false).
CARL SAGANThe universe is not required to be in perfect harmony with human ambition.
More Carl Sagan Quotes
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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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Books are like seeds. They can lie dormant for centuries and then flower in the most unpromising soil.
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The cure for a fallacious argument is a better argument, not the suppression of ideas.
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Science is not only compatible with spirituality; it is a profound source of spirituality.
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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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You are worth about 3 dollars worth in chemicals.
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Nothing disturbs me more than the glorification of stupidity.
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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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Stars are phoenixes, rising from their own ashes.
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The Earth is the only world known so far to harbor life.
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Be grateful everyday for the brief but magnificent opportunity that life provides.
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Better the hard truth, I say, than the comforting fantasy.
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We are like butterflies who flutter for a day and think it is forever.
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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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We make our world significant by the courage of our questions and the depth of our answers.
CARL SAGAN