Top 610 Quotes & Sayings by Carl Sagan
Explore popular quotes and sayings by an American scientist Carl Sagan.
Last updated on December 24, 2024.
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.
We hunger to understand, so we invent myths about how we imagine the world is constructed - and they're, of course, based upon what we know, which is ourselves and other animals. So we make up stories about how the world was hatched from a cosmic egg or created after the mating of cosmic deities or by some fiat of a powerful being.
It's been said that astronomy is a humbling and, I might add, a character-building experience.
For small creatures such as we the vastness is bearable only through love.
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works.
It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.
The universe is not required to be in perfect harmony with human ambition.
The professed function of the nuclear weapons on each side is to prevent the other side from using their nuclear weapons. If that's all it is, then we've gotta as: how many nuclear weapons do you need to do that?
For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.
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?
We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.
The Earth is a very small stage in a vast cosmic arena.
Most of the people that I deal with are human. So I've had a lot of experience with that.
Science is a way of thinking much more than it is a body of knowledge.
Imagination will often carry us to worlds that never were. But without it we go nowhere.
If you wish to make an apple pie from scratch, you must first invent the universe.
The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.
Skeptical scrutiny is the means, in both science and religion, by which deep thoughts can be winnowed from deep nonsense.
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. Not all bits have equal value.
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.
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.
You probably don't need more weapons than what's required to destroy every city on earth. There's only 2,300 cities. So, the United States, by that criteria, only needs 2,300 nuclear weapons - well, we've got more than 25,000!
The universe seems neither benign nor hostile, merely indifferent.
I am often amazed at how much more capability and enthusiasm for science there is among elementary school youngsters than among college students.
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.
I've written a number of books that have to do with the evolution of humans, human intelligence, human emotions.
Extinction is the rule. Survival is the exception.
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.
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.
The boundary between space and the earth is purely arbitrary. And I'll probably always be interested in this planet - it's my favorite.
We're in very bad trouble if we don't understand the planet we're trying to save.
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.
When you make the finding yourself - even if you're the last person on Earth to see the light - you'll never forget it.
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.
We start out a million years ago in a small community on some grassy plain; we hunt animals, have children, and develop a rich social, sexual, and intellectual life, but we know almost nothing about our surroundings.
Even these stars, which seem so numerous, are as sand, as dust - or less than dust - in the enormity of the space in which there is nothing.
A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism.
We are not without empathetic terror when we open Pascal's 'Pensees' and read, 'I am the great silent spaces between worlds.'
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.
No other planet in the solar system is a suitable home for human beings; it's this world or nothing. That's a very powerful perception.
We've arranged a civilization in which most crucial elements profoundly depend on science and technology.
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.
We are the representatives of the cosmos; we are an example of what hydrogen atoms can do, given 15 billion years of cosmic evolution.
I promise to question everything my leaders tell me. I promise to use my critical faculties. I promise to develop my independence of thought. I promise to educate myself so I can make my own judgments.
Nothing disturbs me more than the glorification of stupidity.
The absence of evidence is not the evidence of absence.
Our passion for learning ... is our tool for survival.
I am not an atheist. An atheist is someone who has compelling evidence that there is no Judeo-Christian-Islamic God. I am not that wise, but neither do I consider there to be anything approaching adequate evidence for such a god. Why are you in such a hurry to make up your mind? Why not simply wait until there is compelling evidence?
We are the universe experiencing itself.
If we continue to accumulate only power and not wisdom, we will surely destroy ourselves.
You can't convince a believer of anything; for their belief is not based on evidence, it's based on a deep seated need to believe
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 those in power work for us. In every country, we should be teaching our children the scientific method and the reasons for a Bill of Rights. With it comes a certain decency, humility and community spirit. In the demon-haunted world that we inhabit by virtue of being human, this may be all that stands between us and the enveloping darkness.
Every star may be a sun to someone.
We live on a hunk of rock and metal that circles a humdrum star that is one of 400 billion other stars that make up the Milky Way Galaxy which is one of billions of other galaxies which make up a universe which may be one of a very large number, perhaps an infinite number, of other universes. That is a perspective on human life and our culture that is well worth pondering.
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.
I have a foreboding of an America in my children's or grandchildren's time - [...] when awesome technological powers are in the hands of a very few, and no one representing the public interest can even grasp the issues; when the people have lost the ability to set their own agendas or knowledgeably question those in authority; when, clutching our crystals and nervously consulting our horoscopes, our critical faculties in decline, unable to distinguish between what feels good and what’s true, we slide, almost without noticing, back into superstition and darkness.
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.
We are like butterflies who flutter for a day and think it is forever.
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.
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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