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Carl Sagan  Quotes
Since, in the long run, every planetary civilization will be endangered by impacts from space, every surviving civilization is obliged to become spacefaring–not because of exploratory or romantic zeal, but for the most practical reason...

—Carl Sagan

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HumanityInsightfulSpace-Exploration
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Look again at that dot. That’s here. That’s home. That’s us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The...

—Carl Sagan

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AstronomyInspirationalScience
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We make our purpose.

—Carl Sagan

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ExistenceLifePurpose
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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.

—Carl Sagan

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HumanityIndividualityLove
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For thousands of years humans were oppressed— as some of us still are— by the notion that the universe is a marionette whose strings are pulled by a god or gods, unseen and inscrutable. Then,...

—Carl Sagan

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EnlightenmentGreeceIonia
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Humans — who enslave, castrate, experiment on, and fillet other animals — have had an understandable penchant for pretending animals do not feel pain. A sharp distinction between humans and ‘animals’ is essential if we...

—Carl Sagan

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AnimalsBehaviorCompassion
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If we long for our planet to be important, there is something we can do about it. We make our world significant by the courage of our questions and by the depth of our answers.

—Carl Sagan

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HumanitySaganScience
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It’s a lazy Saturday afternoon, there’s a couple lying naked in bed reading Encyclopediea Brittannica to each other, and arguing about whether the Andromeda Galaxy is more ‘numinous’ than the Ressurection. Do they know how...

—Carl Sagan

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HumorNerdsReligion
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In all our searching, the only thing we’ve found that makes the emptiness bearable is each other.

—Carl Sagan

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EmptinessHumanityLoneliness
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The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself.

—Carl Sagan

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ConnectednessEvolutionLife
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The visions we offer our children shape the future. It _matters_ what those visions are. Often they become self-fulfilling prophecies. Dreams are maps.

—Carl Sagan

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ChildrenDreamsFuture
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Christianity may be good and Satanism evil. Under the Constitution, however, both are neutral. This is an important, but difficult, concept for many law enforcement officers to accept. They are paid to uphold the penal...

—Carl Sagan

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ChristianityConstitutionGod
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If you want to save your child from polio, you can pray or you can inoculate. … Choose science.

—Carl Sagan

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FunnyHumorInoculate
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Avoidable human misery is more often caused not so much by stupidity as by ignorance, particularly our ignorance about ourselves.

—Carl Sagan

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Human-NatureScienceStupidity
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Why do we put up with it? Do we like to be criticized? No, no scientist enjoys it. Every scientist feels a proprietary affection for his or her ideas and findings. Even so, you don’t...

—Carl Sagan

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CriticismPeer-ReviewResearch
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Billions of years from now our sun, then a distended red giant star, will have reduced Earth to a charred cinder. But the Voyager record will still be largely intact, in some other remote region...

—Carl Sagan

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Carl-SaganGolden-RecordsSatellite
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I think the discomfort that some people feel in going to the monkey cages at the zoo is a warning sign.

—Carl Sagan

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EvolutionMonkeyScience
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If we can’t think for ourselves, if we’re unwilling to question authority, then we’re just putty in the hands of those in power. But if the citizens are educated and form their own opinions, then...

—Carl Sagan

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DemocracyEducationHumanity
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I have a foreboding of an America in my children’s or grandchildren’s time — when the United States is a service and information economy; when nearly all the manufacturing industries have slipped away to other...

—Carl Sagan

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9-119-11-0199-Percent
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We are star stuff harvesting sunlight.

—Carl Sagan

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Carl-SaganHumansLife
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Think of how many religions attempt to validate themselves with prophecy. Think of how many people rely on these prophecies, however vague, however unfulfilled, to support or prop up their beliefs. Yet has there ever...

—Carl Sagan

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ProphecyReasonScience
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Ethnocentrism, xenophobia and nationalism are these days rife in many parts of the world. Government repression of unpopular views is still widespread. False or misleading memories are inculcated. For the defenders of such attitudes, science...

—Carl Sagan

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Nationalism
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Books permit us to voyage through time, to tap the wisdom of our ancestors. The library connects us with the insight and knowledge, painfully extracted from Nature, of the greatest minds that ever were, with...

—Carl Sagan

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BooksCivilizationEducation
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You could just as well say that an agnostic is a deeply religious person with at least a rudimentary knowledge of human fallibility.

—Carl Sagan

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AgnosticReligionSkepticism
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It is the responsibility of scientists never to suppress knowledge, no matter how awkward that knowledge is, no matter how it may bother those in power; we are not smart enough to decide which pieces...

—Carl Sagan

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AwkwardKnowledgePower
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The universe is a pretty big place. If it’s just us, seems like an awful waste of space.

—Carl Sagan

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OptimismSetiUniverse
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Then, if we really want our celestial neighbors to know how far we have progressed intelectually, we should have included pictures of Santa Claus, the Easter Bunny and the Tooth Fairy

—Carl Sagan

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Humor-Inspirational
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Cutting off fundamental, curiosity-driven science is like eating the seed corn. We may have a little more to eat next winter but what will we plant so we and our children will have enough to...

—Carl Sagan

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ResearchSaganScience
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The Cosmos is all that is or was or ever will be. Our feeblest contemplations of the Cosmos stir us — there is a tingling in the spine, a catch in the voice, a faint...

—Carl Sagan

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Carl-SaganCosmosLife
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I do not think it irresponsible to portray even the direst futures if we are to avoid them we must understand that they are possible. But where are the alternatives Where are the dreams that...

—Carl Sagan

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BettermentFutureHope
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You have to know the past to understand the present.

—Carl Sagan

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History
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Imagination will often carry us to worlds that never were, but without it we go nowhere.

—Carl Sagan

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Imagination
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National boundaries are not evident when we view the Earth from space. Fanatical ethnic or religious or national chauvinisms are a little difficult to maintain when we see our planet as a fragile blue crescent...

—Carl Sagan

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AlienAstronomyConceit
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Another of Mack’s patients says that the aliens have been taking eggs from her since she was sexually mature, and that her reproductive system baffles her gynecologist. Is it baffling enough to write the case...

—Carl Sagan

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Alien-AbductionEvidenceExtraterrestrials
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Even if the aliens are short, dour, and sexually obsessed—if they’re here, I want to know about them.

—Carl Sagan

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AliensAnal-ProbingExtraterrestrials
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It goes with a courageous intent to greet the universe as it really is, not to foist our emotional predispositions on it but to courageously accept what our explorations tell us.

—Carl Sagan

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CourageLifeReality
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But, Jefferson worried that the people – and the argument goes back to Thucydides and Aristotle – are easily misled. He also stressed, passionately and repeatedly, that it was essential for the people to understand...

—Carl Sagan

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EducationGovernmentPolitics
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We are like butterflies who flutter for a day and think its forever.

—Carl Sagan

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HumanityInspirationalLife
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Cuando hablamos de la “ira” del cielo, la “agitación” del mar, la “resistencia” de los diamantes a ser tallados, la “atracción” que ejerce la Tierra sobre un asteroide cercano o la “excitación” de un átomo,...

—Carl Sagan

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AstronomyAtheismScience
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It seems to me what is called for is an exquisite balance between two conflicting needs: the most skeptical scrutiny of all hypotheses that are served up to us and at the same time a...

—Carl Sagan

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BalanceCritical-ThinkingIdeas
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Could we possible manage the next phase of human history without first dealing with this penchant for dehumanizing the adversary?

—Carl Sagan

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EthicsPhilosophySci-Fi
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No, no, no! My god is a little god, and I want him to stay that way.” A religion, old or new, that stressed the magnificence of the Universe as revealed by modern science might...

—Carl Sagan

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AweCosmologyEpistemology
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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. What I’m saying is, you don’t have to make stories up, you don’t have...

—Carl Sagan

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Ellie-ArrowayFreethinkingReligion
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The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

—Carl Sagan

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BrainFeelingJoy
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The universe seems neither benign nor hostile, merely indifferent.

—Carl Sagan

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IndifferentUniverse
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Extraordinary claims require extraordinary evidence.

—Carl Sagan

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EvidenceFaithScience
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The others would then fall silent and she would continue about doped gallium arsenide detectors, or the ethanol content of the galactic cloud W-3. The quantity of 200-proof alcohol in this single interstellar cloud was...

—Carl Sagan

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AlcoholAstronomyHumor
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A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism.

—Carl Sagan

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LifeOrganized-ReligionReligion
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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. One glance at it and you hear the voice of another person,...

—Carl Sagan

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BooksReadingWriting
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Fireflies out on a warm summer’s night, seeing the urgent, flashing, yellow-white phosphorescence below them, go crazy with desire; moths cast to the winds an enchantment potion that draws the opposite sex, wings beating hurriedly,...

—Carl Sagan

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Sex
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