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Carl Sagan quotes
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“absence of evidence is not evidence of absence.”
Carl Sagan
,
The Demon-Haunted World
“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...”
Carl Sagan
,
The Demon-Haunted World
“We make our world significant by the courage of our questions and by the depth of our answers.”
Carl Sagan
,
Cosmos
“If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.”
Carl Sagan
,
Cosmos
“Atoms are mainly empty space. Matter is composed chiefly of nothing.”
Carl Sagan
,
Cosmos
“There are wonders enough out there without our inventing any.”
Carl Sagan
,
The Demon-Haunted World
“We have examined the universe in space and seen that we live on a mote of dust circling a humdrum star in the remotest corner of an obscure galaxy.”
Carl Sagan
,
Cosmos
“Fanatical ethnic or religious or national chauvinisms are a little difficult to maintain when we see our planet as a fragile blue crescent fading to become an inconspicuous point of light against the bastion and citadel of the stars.”
Carl Sagan
,
Cosmos
“Nature's a lot better at inventing wonders than we are.”
Carl Sagan
,
Contact
“The universe seems neither benign nor hostile, merely indifferent to the concerns of such puny creatures as we.”
Carl Sagan
,
Cosmos
“There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths.”
Carl Sagan
,
The Demon-Haunted World
“We've arranged a global 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.”
Carl Sagan
,
The Demon-Haunted World
“The Hindu religion is the only one of the world’s great faiths dedicated to the idea that the Cosmos itself undergoes an immense, indeed an infinite, number of deaths and rebirths. It is the only religion in which the time scales correspond, no...”
Carl Sagan
,
Cosmos
“The power which a man's imagination has over his body to heal it or make it sick is a force which none of us is born without.”
Carl Sagan
,
The Demon-Haunted World
“Your religion assumes that people are children and need a boogeyman so they'll behave.”
Carl Sagan
,
Contact
“You have to know the past to understand the present.”
Carl Sagan
,
Cosmos
“Imagination will often carry us to worlds that never were. But without it, we go nowhere.”
Carl Sagan
,
Cosmos
“If you wish to make an apple pie from scratch, you must first invent the universe.”
Carl Sagan
,
Cosmos
“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.”
Carl Sagan
,
Cosmos
“We have loved the stars too fondly to be fearful of the night.”
Carl Sagan
,
Cosmos
“We are like butterflies who flutter for a day and think it is forever.”
Carl Sagan
,
Cosmos
“The visions we offer our children shape the future.”
Carl Sagan
,
Pale Blue Dot
“Science is not only compatible with spirituality; it is a profound source of spirituality.”
Carl Sagan
,
The Demon-Haunted World
“Writing is perhaps the greatest of human inventions, binding together people, citizens of distant epochs, who never knew one another. Books break the shackles of time, proof that humans can work magic.”
Carl Sagan
,
Cosmos
“It does no harm to the romance of the sunset to know a little bit about it.”
Carl Sagan
,
Pale Blue Dot
“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.”
Carl Sagan
,
Pale Blue Dot
“But science is a self-correcting enterprise. To be accepted, all new ideas must survive rigorous standards of evidence.”
Carl Sagan
,
Cosmos
“Books permit us to voyage through time, to tap the wisdom of our ancestors. ”
Carl Sagan
,
Cosmos
“Across the sea of space the stars are other suns.”
Carl Sagan
,
Cosmos
“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.”
Carl Sagan
,
Cosmos
“it is undesirable to believe a proposition when there is no ground whatever for supposing it true.”
Carl Sagan
,
Contact
“the history of science . . . teaches that the most we can hope for is successive improvement in our understanding, learning from our mistakes, an asymptotic approach to the Universe, but with the proviso that absolute certainty will always elude us.”
Carl Sagan
,
The Demon-Haunted World
“Every star may be a sun to someone.”
Carl Sagan
,
Cosmos
“Avoidable human misery is more often caused not so much by stupidity as by ignorance, particularly our ignorance about ourselves.”
Carl Sagan
,
The Demon-Haunted World
“It is said that men may not be the dreams of the gods, but rather that the gods are the dreams of men.”
Carl Sagan
,
Cosmos
“nature is always more subtle, more intricate, more elegant than what we are able to imagine.”
Carl Sagan
,
The Demon-Haunted World
“the cure for a fallacious argument is a better argument, not the suppression of ideas.”
Carl Sagan
,
The Demon-Haunted World
“The truth may be puzzling or counterintuitive. It may contradict deeply held beliefs. Experiment is how we get a handle on it.”
Carl Sagan
,
The Demon-Haunted World
“We grow up in isolation. Only slowly do we teach ourselves the Cosmos.”
Carl Sagan
,
Cosmos
“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
,
The Demon-Haunted World
“if your God wanted to convince us, he could have done a much better job.”
Carl Sagan
,
Contact
“in science there are no authorities; at most, there are experts.”
Carl Sagan
,
The Demon-Haunted World
“Books are like seeds. They can lie dormant for centuries and then flower in the most unpromising soil.”
Carl Sagan
,
Cosmos
“Isn't a gram of observation worth a ton of theory? ”
Carl Sagan
,
Contact
“Cosmos is a Greek word for the order of the universe. It is, in a way, the opposite of Chaos.”
Carl Sagan
,
Cosmos
“If our long-term survival is at stake, we have a basic responsibility to our species venture to other worlds. Sailors on a becalmed sea, we sense the stirring of a breeze.”
Carl Sagan
,
Pale Blue Dot
“It's a lazy Saturday afternoon, and there's this couple lying naked in bed reading the Encyclopaedia Britannica to each other, and arguing about whether the Andromeda Galaxy is more 'numinous' than the Resurrection. Do they know how to have a...”
Carl Sagan
,
Contact
“Any faith that admires truth, that strives to know God, must be brave enough to accommodate the universe.”
Carl Sagan
,
Contact
“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 that memory is called the library.”
Carl Sagan
,
Cosmos
“It's hard to kill a creature once it lets you see its consciousness.”
Carl Sagan
,
Contact
view all 68 quotes
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Cosmos
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