Carl Sagan Quotes

Biography

Type: American astronomer, cosmologist, astrophysicist, astrobiologist, author, science popularize

Born: November 9, 1934, Brooklyn, New York, U.S.

Died: 20, 1996 (aged 62), Seattle, Washington%

Carl Sagan was probably the most well-known scientist of the 1970s and 1980s. He studied extraterrestrial intelligence, advocated for nuclear disarmament, and co-wrote and hosted "Cosmos: A Personal Voyage".

Carl Sagan Quotes

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

Every one of us is, in the cosmic perspective, precious. If a human disagrees with you,
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.

But the fact that some geniuses were laughed at does not imply that all who are
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, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.

If it can be destroyed by the truth, it deserves to be destroyed by the truth..
If it can be destroyed by the truth, it deserves to be destroyed by the truth.

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

Who is more humble? The scientist who looks at the universe with an open mind and
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?

The truth may be puzzling. It may take some work to grapple with. It may be
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.

Writing is perhaps the greatest of human inventions, binding together people who never knew each other,
Writing is perhaps the greatest of human inventions, binding together people who never knew each other, citizens of distant epochs. Books break the shackles of time. A book is proof that humans are capable of magic.

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

It's a lazy Saturday afternoon, there's a couple lying naked in bed reading Encyclopediea Brittannica to
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 to have a good time, or don't they?

The Cosmos is all that is or was or ever will be. Our feeblest contemplations of
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 sensation, as if a distant memory, of falling from a height. We know we are approaching the greatest of mysteries.

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

So those who wished for some central cosmic purpose for us, or at least our world,
So those who wished for some central cosmic purpose for us, or at least our world, or at least our solar system, or at least our galaxy, have been disappointed, progressively disappointed. The universe is not responsive to our ambitious expectations.

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

It goes with a courageous intent to greet the universe as it really is, not to
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.

Science is only a Latin word for knowledge. Carl Sagan
Science is only a Latin word for knowledge

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

I consider it an extremely dangerous doctrine, because the more likely we are to assume that
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.

The fossil record implies trial and error, the inability to anticipate the future, features inconsistent with
The fossil record implies trial and error, the inability to anticipate the future, features inconsistent with a Great Designer (though not a Designer of a more remote and indirect temperament.)

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

If we are merely matter intricately assembled, is this really demeaning? If there's nothing here but atoms, does that make us less or does that make matter more?

La prueba de ausencia no es prueba de ausencia

The idea that God is an oversized white male with a flowing beard, who sits in the sky and tallies the fall of every sparrow is ludicrous. But if by 'God,' one means the set of physical laws that govern the universe, then clearly there is such a God. This God is emotionally unsatisfying... it does not make much sense to pray to the law of gravity.

It is said that men may not be the dreams of the god, but rather that the gods are the dreams of men.

Our God Is Alive and Well. Sorry About Yours.

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

We've arranged a civilization in which most crucial elements profoundly depend on science and technology. We have also arranged things so that almost no one understands science and technology. This is a prescription for disaster.

Those at too great a distance may, I am well are, mistake ignorance for perspective.

I would suggest that science is, at least in my part, informed worship.

In that case, on behalf of Earthlife, I urge that, with full knowledge of our limitations, we vastly increase our knowledge of the Solar System and then begin to settle other worlds.

I don't want to believe. I want to know.

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. Microbiology and meteorology now explain what only a few centuries ago was considered sufficient cause to burn women to death.

Nevertheless, (Jefferson) believed that the habit of skepticism is an essential prerequisite for responsible citizenship. He argued that the cost of education is trivial compared to the cost of ignorance, of leaving government to the wolves. He taught that the country is safe only when the people rule.

There is much that science doesn't understand, many mysteries still to be resolved. In a Universe tens of billions of light-years across and some ten or fifteen billion years old, this may be the case forever. We are constantly stumbling on new surprises

You squeeze the eyedropper, and a drop of pond water drips out onto the microscope stage. You look at the projected image. The drop is full of life - strange beings swimming, crawling, tumbling; high dramas of pursuit and escape, triumph and tragedy. This is a world populated by beings far more exotic than in any science fiction movie...

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.

Your religion assumes that people are children and need a boogeyman so they'll behave. You want people to believe in God so they'll obey the law. That's the only means that occurs to you: a strict secular police force, and the threat of punishment by an all-seeing God for whatever the police overlook. You sell human beings short.

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

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 to exaggerate. There's wonder and awe enough in the real world. Nature's a lot better at inventing wonders than we are.

Any faith that admires truth, that strives to know God, must be brave enough to accommodate the universe.

Religions are often state-protected nurseries of pseudoscience, although there's no reason why religions have to play that role. In a way, it's an artefact from times long gone.

Perhaps the depth of love can be calibrated by the number of different selves that are actively involved in a given relationship.

Somewhere, something incredible is waiting to be known.

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

Extraordinary claims require extraordinary evidence.

We are a way for the cosmos to know itself.

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

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.

We are all star stuff.

Science is based on experiment, on a willingness to challenge old dogma, on an openness to see the universe as it really is. Accordingly, science sometimes requires courage - at the very least the courage to question the conventional wisdom.

The way to find out about our place in the universe is by examining the universe and by examining ourselves - without preconceptions, with as unbiased a mind as we can muster.

[When a religious couple wrote to Sagan about fulfilled prophecies, he wrote back in May 1996:]

If ‘fulfilled prophecy’ is your criterion, why do you not believe in materialistic science, which has an unparalleled record of fulfilled prophecy? Consider, for example, eclipses.

Extinction is the rule. Survival is the exception.

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?

There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths.

We can't help it. Life looks for life.

She had studied the universe all her life, but had overlooked its clearest message: For small creatures such as we the vastness is bearable only through love.

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.

A blade of grass is a commonplace on Earth; it would be a miracle on Mars. Our descendants on Mars will know the value of a patch of green. And if a blade of grass is priceless, what is the value of a human being?

We are star stuff harvesting sunlight.

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

You can get into a habit of thought in which you enjoy making fun of all those other people who don't see things as clearly as you do. We have to guard carefully against it.

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 get through the winters to come?

The prediction I can make with the highest confidence is that the most amazing discoveries will be the ones we are not today wise enough to foresee.

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.

There are many hypotheses in science which are wrong. That’s perfectly all right: it’s the aperture to finding out what’s right. Science is a self-correcting process.

Claims that cannot be tested, assertions immune to disproof are veridically worthless, whatever value the may have in inspiring us or in exciting our sense of wonder.

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.

The lifetime of a human being is measured by decades, the lifetime of the Sun is a hundred million times longer. Compared to a star, we are like mayflies, fleeting ephemeral creatures who live out their lives in the course of a single day.

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.

The near side of a galaxy is tens of thousands of light-years closer to us than the far side; thus we see the front as it was tens of thousands of years before the back. But typical events in galactic dynamics occupy tens of millions of years, so the error in thinking of an image of a galaxy as frozen in one moment of time is small.

By looking far out into space we are also looking far back into time, back toward the horizon of the universe, back toward the epoch of the Big Bang.

Science is a way to call the bluff of those who only pretend to knowledge. It is a bulwark against mysticism, against superstition, against religion misapplied to where it has no business being.

When we look up at night and view the stars, everything we see is shinning because of distant nuclear fusion.

And you are made of a hundred trillion cells. We are, each of us, a multitude.

On Titan the molecules that have been raining down like manna from heaven for the last 4 billion years might still be there largely unaltered deep-frozen awaiting the chemists from Earth

These days there seems to be nowhere left to explore, at least on the land area of the Earth. Victims of their very success, the explorers now pretty much stay home.

We must understand the Cosmos as it is and not confuse how it is with how we wish it to be.

We are star stuff which has taken its destiny into its own hands.

Science cuts two ways, of course; its products can be used for both good and evil. But there's no turning back from science.

المزاعم الاستثنائية، تحتاج إلى أدلة استثنائية

El universo no fue hecho a medida del hombre; tampoco le es hostil: es indiferente.

The whole idea of a democratic application of skepticism is that everyone should have the essential tools to effectively and constructively evaluate claims to knowledge.

Advertising teaches people not to trust their judgment. Advertising teaches people to be stupid.

No question; language can free us of feeling, or almost. Maybe that's one of its functions - so we can understand the world without becoming entirely overwhelmed by it.

[...] afirmações extraordinárias requerem evidência extraordinária.

Might it be possible at some future time, when neurophysiology has advanced substantially, to reconstruct the memories or insight of someone long dead?...It would be the ultimate breach of privacy.

It is certainly true that all beliefs and all myths are worthy of a respectful hearing. It is not true that all folk beliefs are equally valid - if we’re talking not about an internal mindset, but about understanding of the external reality.

Black holes collect problems faster than they collect matter.

The secrets of evolution, are time and death.

There's an unbroken thread that stretches from those first cells to us.

Meanwhile the Cosmos is rich beyond measure: the total number of stars in the universe is greater than all the grains of sand on all the beaches of the planet Earth.

It was difficult to hold Broca's brain without wondering whether in some sense Broca was still in there - his wit, his skeptical mien, his abrupt gesticulations when he talked, his quiet and sentimental moments.

Those are some of the things that molecules do, given four billion years of evolution

...You think if I haven't had your religious experience I can't appreciate the magnificence of your god. But it's just the opposite. I listen to you, and I think, his god is too small! One paltry planet, a few thousand years - hardly worth the attention of a minor deity, much less the Creator of the universe.

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.

Books are like seeds. They can lie dormant for centuries and then flower in the most unpromising soil.

There were many women in the Soviet scientific community, proportionately more so than in the United States. But they tended to occupy menial middle-level positions, and male Soviet scientists, like their American counterparts, were puzzled about a pretty woman with evident scientific competence who forcefully expressed her views.

The sky calls to us. If we do not destroy ourselves, we will one day venture to the stars.

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.

The symbolism seemed so apt. The same technology that can propel apocalyptic weapons from continent to continent would enable the first human voyage to another planet. It was a choice of fitting mythic power: to embrace the planet named after, rather than the madness ascribed to, the god of war.

Advances in medicine and agriculture have saved vastly more lives than have been lost in all the wars in history.

You have to know the past to understand the present.

In the vastness of space and the immensity of time, it is my joy to share a planet and an epoch with Annie.

[Dedication to Sagan's wife, Ann Druyan, in Cosmos]

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

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

The vast distances that separate the stars are providential. Beings and worlds are quarantined from one another. The quarantine is lifted only for those with sufficient self-knowledge and judgment to have safely traveled from star to star.

[an encounter in space] "Some celestial event. No-no words-no words to describe it. Poetry! They should have sent a poet. So beautiful. So beautiful...I had no idea. I had no idea.

We are the only species on the planet, so far as we know, to have invented a communal memory stored neither in our genes nor in our brains. The warehouse of this memory is called the library

A central lesson of science is that to understand complex issues (or even simple ones), we must try to free our minds of dogma and to guarantee the freedom to publish, to contradict, and to experiment. Arguments from authority are unacceptable.

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 of knowledge are permissible, and which are not. …

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

At the heart of science is an essential tension between two seemingly contradictory attitueds-an openness to new ideas, no matter how bizarre or counterintuitive they may be, and the most ruthless skeptical scrutiny of all ideas, old and new.

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