The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.
CARL SAGANThe total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.
More Carl Sagan Quotes
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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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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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Understanding is a kind of ecstasy.
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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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I consider it an extremely dangerous doctrine, because the more likely we are to assume that the solution comes from the outside, the less likely we are to solve our problems ourselves.
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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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Imagination will often carry us to worlds that never were, but without it we go nowhere.
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One of the great commandments of science is: Mistrust arguments from authority.
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One glance at a book and you hear the voice of another person, perhaps someone dead for 1,000 years. To read is to voyage through time.
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If we ruin the earth, there is no place else to go.
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All civilizations become either spacefaring or extinct.
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For small creatures such as we the vastness is bearable only through love.
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I’ve always thought an agnostic is an atheist without the courage of his convictions.
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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.
CARL SAGAN