Perhaps the depth of love can be calibrated by the number of different selves that are actively involved in a given relationship.
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 universe seems neither benign nor hostile, merely indifferent.
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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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Not explaining science seems to me perverse. When you’re in love, you want to tell the world.
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The Earth is the only world known so far to harbor life.
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To live in the hearts we leave behind is to live forever.
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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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Stars are phoenixes, rising from their own ashes.
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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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Avoidable human misery is more often caused not so much by stupidity as by ignorance, particularly our ignorance about ourselves.
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If you wish to make an apple pie from scratch, you must first invent the universe.
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The very act of understanding is a celebration of joining, merging, even if on a very modest scale, with the magnificence of the Cosmos.
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I would suggest that science is, at least in my part, informed worship.
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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.
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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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If we ruin the earth, there is no place else to go.
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One of the greatest gifts adults can give – to their offspring and to their society – is to read to children.
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Those at too great a distance may, I am well are, mistake ignorance for perspective.
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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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All civilizations become either spacefaring or extinct.
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Understanding is a kind of ecstasy.
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Science is an attempt, largely successful, to understand the world, to get a grip on things, to get hold of ourselves, to steer a safe course.
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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 beauty of a living thing is not the atoms that go into it, but the way those atoms are put together.
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Books permit us to voyage through time, to tap the wisdom of our ancestors.
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Imagination will often carry us to worlds that never were, but without it we go nowhere.
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The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.
CARL SAGAN