We make our world significant by the courage of our questions and the depth of our answers.
CARL SAGANNature is unsentimental. Death is built in.
More Carl Sagan Quotes
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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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There are as many atoms in one molecule of DNA as there are stars in a typical galaxy.
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Imagination will often carry us to worlds that never were, but without it we go nowhere.
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If we ruin the earth, there is no place else to go.
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People are not stupid. They believe things for reasons.
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I think the health of our civilization, the depth of our awareness about the underpinnings of our culture and our concern for the future can all be tested by how well we support our libraries.
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I don’t want to believe. I want to know.
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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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Exploration is in our nature. We began as wanderers, and we are wanderers still. We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars.
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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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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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Don’t judge everyone else by your own limited experience.
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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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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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We are all stardust.
CARL SAGAN