The Earth is the only world known so far to harbor life.
CARL SAGANOther things being equal, it is better to be smart than to be stupid.
More Carl Sagan Quotes
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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 significance of our lives and our fragile planet is then determined only by our own wisdom and courage.
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Perhaps the depth of love can be calibrated by the number of different selves that are actively involved in a given relationship.
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If I finish a book a week, I will read only a few thousand books in my lifetime, about a tenth of a percent of the contents of the greatest libraries of our time. The trick is to know which books to read.
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Not all birds can fly. What separates the flyers from the walkers is the ability to take off.
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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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Stars are phoenixes, rising from their own ashes.
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You have to know the past to understand the present.
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I don’t want to believe. I want to know.
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The notion that science and spirituality are somehow mutually exclusive does a disservice to both.
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Science is a way of thinking much more than it is a body of knowledge.
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If I finish a book a week, I will read only a few thousand books in my lifetime, about a tenth of a percent of the contents of the greatest libraries of our time. The trick is to know which books to read.
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Understanding is a kind of ecstasy.
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An atheist is someone who is certain that God does not exist, someone who has compelling evidence against the existence of God.
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For small creatures such as we the vastness is bearable only through love.
CARL SAGAN