An atheist is someone who is certain that God does not exist, someone who has compelling evidence against the existence of God.
CARL SAGANWriting is the greatest of human inventions, binding together people, citizens of distant epochs, who never knew one another.
More Carl Sagan Quotes
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We are like butterflies who flutter for a day and think it is forever.
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Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.
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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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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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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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The significance of our lives and our fragile planet is then determined only by our own wisdom and courage.
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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.
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You are worth about 3 dollars worth in chemicals.
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The universe is not required to be in perfect harmony with human ambition.
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Not explaining science seems to me perverse. When you’re in love, you want to tell the world.
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Science is a way of thinking much more than it is a body of knowledge.
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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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We make our world significant by the courage of our questions and the depth of our answers.
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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 Earth is the only world known so far to harbor life.
CARL SAGAN