One of the great commandments of science is: Mistrust arguments from authority.
CARL SAGANAn atheist is someone who is certain that God does not exist, someone who has compelling evidence against the existence of God.
More Carl Sagan Quotes
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The visions we offer our children shape the future.
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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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The universe is a pretty big place. If it’s just us, seems like an awful waste of space.
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The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.
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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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A galaxy is composed of gas and dust and stars – billions upon billions of stars. Every star may be a sun to someone.
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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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Writing is the greatest of human inventions, binding together people, citizens of distant epochs, who never knew one another.
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Stars are phoenixes, rising from their own ashes.
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Better the hard truth, I say, than the comforting fantasy.
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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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Understanding is a kind of ecstasy.
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And you are made of a hundred trillion cells. We are, each of us, a multitude.
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There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths.
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Not explaining science seems to me perverse. When you’re in love, you want to tell the world.
CARL SAGAN