71 Overwhelming Carl Sagan Quotes (With Images)

Carl Sagan was an astrophysicist and influential cosmologist who was born in Brooklyn, New York. He was a science communicator, popular for his futuristic TV series called Cosmos: A Personal Voyage. Withour further delay, here is an inspiring collection of Car Sagan Quotes about technology, our earth, the universe, and cosmos.

1) For small creatures such as we the vastness is bearable only through love.

Carl Sagan Quote - For small creatures such as we the vastness is bearable only through love.

2) Imagination will often carry us to worlds that never were. But without it we go nowhere.

Carl Sagan Quote - Imagination will often carry us to worlds that never were. But without it we go nowhere.

3) Somewhere, something incredible is waiting to be known.

Carl Sagan Quote - Somewhere, something incredible is waiting to be known.

4) 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 Quote - 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.

5) We’re made of star stuff. We are a way for the cosmos to know itself.

Carl Sagan Quote - We're made of star stuff. We are a way for the cosmos to know itself.

6) We’ve arranged a civilization in which most crucial elements profoundly depend on science and technology.

Carl Sagan Quote - We've arranged a civilization in which most crucial elements profoundly depend on science and technology.

7) The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies was made in the interiors of collapsing stars. We are made of star stuff.

Carl Sagan Quote - The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies was made in the interiors of collapsing stars. We are made of star stuff.

8) Science is not only compatible with spirituality; it is a profound source of spirituality.

Carl Sagan Quote - Science is not only compatible with spirituality; it is a profound source of spirituality.

9) If you want to make an apple pie from scratch, you must first create the universe.

Carl Sagan Quote - If you want to make an apple pie from scratch, you must first create the universe.

10) The universe seems neither benign nor hostile, merely indifferent.

Carl Sagan Quote - The universe seems neither benign nor hostile, merely indifferent.

11) For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.

Carl Sagan Quote - For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.

12) 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.

Carl Sagan Quote - 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.

13) We are like butterflies who flutter for a day and think it is forever.

Carl Sagan Quote - We are like butterflies who flutter for a day and think it is forever.

14) There is a wide, yawning black infinity. In every direction, the extension is endless; the sensation of depth is overwhelming. And the darkness is immortal. Where light exists, it is pure, blazing, fierce; but light exists almost nowhere, and the blackness itself is also pure and blazing and fierce.

Carl Sagan Quote - There is a wide, yawning black infinity. In every direction, the extension is endless; the sensation of depth is overwhelming. And the darkness is immortal. Where light exists, it is pure, blazing, fierce; but light exists almost nowhere, and the blackness itself is also pure and blazing and fierce.

15) Extraordinary claims require extraordinary evidence.

Carl Sagan Quote - Extraordinary claims require extraordinary evidence.

16) If you wish to make an apple pie from scratch, you must first invent the universe.

Carl Sagan Quote - If you wish to make an apple pie from scratch, you must first invent the universe.

17) Absence of evidence is not evidence of absence.

Carl Sagan Quote - Absence of evidence is not evidence of absence.

18) When you make the finding yourself – even if you’re the last person on Earth to see the light – you’ll never forget it.

Carl Sagan Quote - When you make the finding yourself - even if you're the last person on Earth to see the light - you'll never forget it.

19) Who is more humble? The scientist who looks at the universe with an open mind and accepts whatever the universe has to teach us, or somebody who says everything in this book must be considered the literal truth and never mind the fallibility of all the human beings involved?

Carl Sagan Quote - Who is more humble? The scientist who looks at the universe with an open mind and accepts whatever the universe has to teach us, or somebody who says everything in this book must be considered the literal truth and never mind the fallibility of all the human beings involved?

20) One of the saddest lessons of history is this: If we’ve been bamboozled long enough, we tend to reject any evidence of the bamboozle. We’re no longer interested in finding out the truth. The bamboozle has captured us. It’s simply too painful to acknowledge, even to ourselves, that we’ve been taken. Once you give a charlatan power over you, you almost never get it back.

Carl Sagan Quote - One of the saddest lessons of history is this: If we’ve been bamboozled long enough, we tend to reject any evidence of the bamboozle. We’re no longer interested in finding out the truth. The bamboozle has captured us. It’s simply too painful to acknowledge, even to ourselves, that we’ve been taken. Once you give a charlatan power over you, you almost never get it back.

21) I can find in my undergraduate classes, bright students who do not know that the stars rise and set at night, or even that the Sun is a star.

Carl Sagan Quote - I can find in my undergraduate classes, bright students who do not know that the stars rise and set at night, or even that the Sun is a star.

22) It pays to keep an open mind, but not so open your brains fall out.

Carl Sagan Quote - It pays to keep an open mind, but not so open your brains fall out.

23) In science it often happens that scientists say, ‘You know that’s a really good argument; my position is mistaken,’ and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn’t happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.

Carl Sagan Quote - In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.

24) We’re in very bad trouble if we don’t understand the planet we’re trying to

Carl Sagan Quote - We're in very bad trouble if we don't understand the planet we're trying to

25) I would love to believe that when I die I will live again, that some thinking, feeling, remembering part of me will continue. But as much as I want to believe that, and despite the ancient and worldwide cultural traditions that assert an afterlife, I know of nothing to suggest that it is more than wishful thinking.

Carl Sagan Quote - I would love to believe that when I die I will live again, that some thinking, feeling, remembering part of me will continue. But as much as I want to believe that, and despite the ancient and worldwide cultural traditions that assert an afterlife, I know of nothing to suggest that it is more than wishful thinking.

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

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

27) Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out.

Carl Sagan Quote - Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out.

28) But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, and they laughed at the Wright brothers. But they also laughed at Bozo the Clown.

Carl Sagan Quote - But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, and they laughed at the Wright brothers. But they also laughed at Bozo the Clown.

29) Books permit us to voyage through time, to tap the wisdom of our ancestors.

Carl Sagan Quote - Books permit us to voyage through time, to tap the wisdom of our ancestors.

30) All of the books in the world contain no more information than is broadcast as video in a single large American city in a single year.

Carl Sagan Quote - All of the books in the world contain no more information than is broadcast as video in a single large American city in a single year.

31) We can judge our progress by the courage of our questions and the depth of our answers, our willingness to embrace what is true rather than what feels good.

Carl Sagan Quote - We can judge our progress by the courage of our questions and the depth of our answers, our willingness to embrace what is true rather than what feels good.

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

Carl Sagan Quote - The universe is a pretty big place. If it's just us, seems like an awful waste of space.

33) The universe is not required to be in perfect harmony with human ambition.

Carl Sagan Quote - The universe is not required to be in perfect harmony with human ambition.

34) You’re an interesting species. An interesting mix. You’re capable of such beautiful dreams, and such horrible nightmares. You feel so lost, so cut off, so alone, only you’re not. See, in all our searching, the only thing we’ve found that makes the emptiness bearable, is each other.

Carl Sagan Quote - You're an interesting species. An interesting mix. You're capable of such beautiful dreams, and such horrible nightmares. You feel so lost, so cut off, so alone, only you’re not. See, in all our searching, the only thing we've found that makes the emptiness bearable, is each other.

35) I don’t want to believe. I want to know.

Carl Sagan Quote - I don't want to believe. I want to know.

36) I am often amazed at how much more capability and enthusiasm for science there is among elementary school youngsters than among college students.

Carl Sagan Quote - I am often amazed at how much more capability and enthusiasm for science there is among elementary school youngsters than among college students.

37) Frederick Douglass taught that literacy is the path from slavery to freedom. There are many kinds of slavery and many kinds of freedom, but reading is still the path.

Carl Sagan Quote - Frederick Douglass taught that literacy is the path from slavery to freedom. There are many kinds of slavery and many kinds of freedom, but reading is still the path.

38) The nuclear arms race is like two sworn enemies standing waist deep in gasoline, one with three matches, the other with five.

Carl Sagan Quote - The nuclear arms race is like two sworn enemies standing waist deep in gasoline, one with three matches, the other with five.

39) Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people.

Carl Sagan Quote - Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people.

40) How is it that hardly any major religion has looked at science and concluded, ‘This is better than we thought! The Universe is much bigger than our prophets said, grander, more subtle, more elegant?’ Instead they say, ‘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 be able to draw forth reserves of reverence and awe hardly tapped by the conventional faiths.

Carl Sagan Quote - How is it that hardly any major religion has looked at science and concluded, ‘This is better than we thought! The Universe is much bigger than our prophets said, grander, more subtle, more elegant?’ Instead they say, ‘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 be able to draw forth reserves of reverence and awe hardly tapped by the conventional faiths.

41) The truth may be puzzling. It may take some work to grapple with. It may be counterintuitive. It may contradict deeply held prejudices. It may not be consonant with what we desperately want to be true. But our preferences do not determine what’s true.

Carl Sagan Quote - The truth may be puzzling. It may take some work to grapple with. It may be counterintuitive. It may contradict deeply held prejudices. It may not be consonant with what we desperately want to be true. But our preferences do not determine what's true.

42) It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.

Carl Sagan Quote - It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.

43) Extinction is the rule. Survival is the exception.

Carl Sagan Quote - Extinction is the rule. Survival is the exception.

44) The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together.

Carl Sagan Quote - The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together.

45) Science is a way of thinking much more than it is a body of knowledge.

Carl Sagan Quote - Science is a way of thinking much more than it is a body of knowledge.

46) Skeptical scrutiny is the means, in both science and religion, by which deep thoughts can be winnowed from deep nonsense.

Carl Sagan Quote - Skeptical scrutiny is the means, in both science and religion, by which deep thoughts can be winnowed from deep nonsense.

47) We make our world significant by the courage of our questions and the depth of our answers.

Carl Sagan Quote - We make our world significant by the courage of our questions and the depth of our answers.

48) The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

Carl Sagan Quote - The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

49) If we long to believe that the stars rise and set for us, that we are the reason there is a Universe, does science do us a disservice in deflating our conceits?

Carl Sagan Quote - If we long to believe that the stars rise and set for us, that we are the reason there is a Universe, does science do us a disservice in deflating our conceits?

50) The earth is a very small stage in a vast cosmic arena.

Carl Sagan Quote - The earth is a very small stage in a vast cosmic arena.

51) We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.

Carl Sagan Quote - We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.

52) We have also arranged things so that almost no one understands science and technology. This is a prescription for disaster. We might get away with it for a while, but sooner or later this combustible mixture of ignorance and power is going to blow up in our faces.

Carl Sagan Quote - We have also arranged things so that almost no one understands science and technology. This is a prescription for disaster. We might get away with it for a while, but sooner or later this combustible mixture of ignorance and power is going to blow up in our faces.

53) 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.

Carl Sagan Quote - 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.

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

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

55) There are naive questions, tedious questions, ill-phrased questions, questions put after inadequate self-criticism. But every question is a cry to understand the world. There is no such thing as a dumb question.

Carl Sagan Quote - There are naive questions, tedious questions, ill-phrased questions, questions put after inadequate self-criticism. But every question is a cry to understand the world. There is no such thing as a dumb question.

56) 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.

Carl Sagan Quote - 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.

57) Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.

Carl Sagan Quote - Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.

58) But I try not to think with my gut. If I’m serious about understanding the world, thinking with anything besides my brain, as tempting as that might be, is likely to get me into trouble.

Carl Sagan Quote - But I try not to think with my gut. If I’m serious about understanding the world, thinking with anything besides my brain, as tempting as that might be, is likely to get me into trouble.

59) The illegality of cannabis is outrageous, an impediment to full utilization of a drug which helps produce the serenity and insight, sensitivity and fellowship so desperately needed in this increasingly mad and dangerous world.

Carl Sagan Quote - The illegality of cannabis is outrageous, an impediment to full utilization of a drug which helps produce the serenity and insight, sensitivity and fellowship so desperately needed in this increasingly mad and dangerous world.

60) In our obscurity – in all this vastness – there is no hint that help will come from elsewhere to save us from ourselves. It is up to us.

Carl Sagan Quote - In our obscurity - in all this vastness - there is no hint that help will come from elsewhere to save us from ourselves. It is up to us.

61) What a marvelous cooperative arrangement – plants and animals each inhaling each other’s exhalations, a kind of planet-wide mutual mouth-to-stoma resuscitation, the entire elegant cycle powered by a star 150 million kilometers away.

Carl Sagan Quote - What a marvelous cooperative arrangement – plants and animals each inhaling each other’s exhalations, a kind of planet-wide mutual mouth-to-stoma resuscitation, the entire elegant cycle powered by a star 150 million kilometers away.

62) Our posturings, our imagined self-importance, the delusion that we have some privileged position in the universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark.

Carl Sagan Quote - Our posturings, our imagined self-importance, the delusion that we have some privileged position in the universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark.

63) If God is omnipotent and omniscient, why didn’t he start the universe out in the first place so it would come out the way he wants? Why’s he constantly repairing and complaining? No, there’s one thing the Bible makes clear: The biblical God is a sloppy manufacturer. He’s not good at design, he’s not good at execution. He’d be out of business, if there was any competition.

Carl Sagan Quote - If God is omnipotent and omniscient, why didn’t he start the universe out in the first place so it would come out the way he wants? Why’s he constantly repairing and complaining? No, there’s one thing the Bible makes clear: The biblical God is a sloppy manufacturer. He’s not good at design, he’s not good at execution. He’d be out of business, if there was any competition.

64) The world is so exquisite with so much love and moral depth, that there is no reason to deceive ourselves with pretty stories for which there’s little good evidence. Far better it seems to me, in our vulnerability, is to look death in the eye and to be grateful every day for the brief but magnificent opportunity that life provides.

Carl Sagan Quote - The world is so exquisite with so much love and moral depth, that there is no reason to deceive ourselves with pretty stories for which there's little good evidence. Far better it seems to me, in our vulnerability, is to look death in the eye and to be grateful every day for the brief but magnificent opportunity that life provides.

65) The dangers of not thinking clearly are much greater now than ever before. It’s not that there’s something new in our way of thinking – it’s that credulous and confused thinking can be much more lethal in ways it was never before.

Carl Sagan Quote - The dangers of not thinking clearly are much greater now than ever before. It's not that there's something new in our way of thinking - it's that credulous and confused thinking can be much more lethal in ways it was never before.

66) We are fortunate: we are alive; we are powerful; the welfare of our civilization and our species is in our hands. If we do not speak for Earth, who will? If we are not committed to our own survival, who will be?

Carl Sagan Quote - We are fortunate: we are alive; we are powerful; the welfare of our civilization and our species is in our hands. If we do not speak for Earth, who will? If we are not committed to our own survival, who will be?

67) It is of interest to note that while some dolphins are reported to have learned English – up to fifty words used in correct context – no human being has been reported to have learned dolphinese.

Carl Sagan Quote - It is of interest to note that while some dolphins are reported to have learned English - up to fifty words used in correct context - no human being has been reported to have learned dolphinese.

68) Today, we’re still loaded down – and, to some extent, embarrassed – by ancient myths, but we respect them as part of the same impulse that has led to the modern, scientific kind of myth. But we now have the opportunity to discover, for the first time, the way the universe is in fact constructed as opposed to how we would wish it to be constructed.

Carl Sagan Quote - Today, we're still loaded down - and, to some extent, embarrassed - by ancient myths, but we respect them as part of the same impulse that has led to the modern, scientific kind of myth. But we now have the opportunity to discover, for the first time, the way the universe is in fact constructed as opposed to how we would wish it to be constructed.

69) I believe that the extraordinary should certainly be pursued. But extraordinary claims require extraordinary evidence.

Carl Sagan Quote - I believe that the extraordinary should certainly be pursued. But extraordinary claims require extraordinary evidence.

70) The significance of our lives and our fragile planet is then determined only by our own wisdom and courage. We are the custodians of life’s meaning. We long for a Parent to care for us, to forgive us our errors, to save us from our childish mistakes. But knowledge is preferable to ignorance. Better by far to embrace the hard truth than a reassuring fable. If we crave some cosmic purpose, then let us find ourselves a worthy goal.

Carl Sagan Quote - The significance of our lives and our fragile planet is then determined only by our own wisdom and courage. We are the custodians of life's meaning. We long for a Parent to care for us, to forgive us our errors, to save us from our childish mistakes. But knowledge is preferable to ignorance. Better by far to embrace the hard truth than a reassuring fable. If we crave some cosmic purpose, then let us find ourselves a worthy goal.

71) People are not stupid. They believe things for reasons. The last way for skeptics to get the attention of bright, curious, intelligent people is to belittle or condescend or to show arrogance toward their beliefs.

Carl Sagan Quote - People are not stupid. They believe things for reasons. The last way for skeptics to get the attention of bright, curious, intelligent people is to belittle or condescend or to show arrogance toward their beliefs.

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