Carl Sagan citations (372 citations, Page 11)

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Carl Sagan citations célèbres

“Le fait que l'on ait ri de génies n'implique pas que tous ceux dont on rit sont des génies. Ils ont ri de.”

Carl Sagan livre Broca's Brain

Broca's Brain, 1979

“Des affirmations extraordinaires nécessitent des preuves extraordinaires.”

Carl Sagan livre Cosmos

Extraordinary claims require extraordinary evidence.
en
Citation presque identique à Extraordinary claims require extraordinary proof. de Marcello Truzzi, co-fondateur du Committee for Skeptical Inquiry.
Cosmos, 1980

“Dans la pseudoscience, les hypothèses sont souvent formulées de telle manière qu'elles soient invulnérables à toute expérience qui puisse les réfuter; comme cela même en principe c'est impossible de les invalider. Ceux qui la pratiquent sont toujours sur la défensive et méfiants. Ils s'opposent à l'examen sceptique; et quand l'hypothèse pseudoscientifique ne réussit pas à convaincre les scientifiques, ils déduisent qu'il y a des conspirations pour la supprimer.”

Carl Sagan livre The Demon-Haunted World

[In Pseudoscience] hypothesis are often framed precisely so that they are invulnerable to any experiment that offers a prospect of disproof, so even in principle they cannot be invalidated. Practitioners are defensive and wary. Skeptical scrutiny is opposed. When the pseudoscientific hypothesis fails to catch fire with scientists, conspiracies to suppress it are deduced.
en
The Demon-Haunted World (1995)

“Tu es fait de cent mille milliards de cellules. Nous sommes, chacun, une multitude.”

Carl Sagan livre Cosmos

You are made of a hundred trillion cells. We are, each of us, a multitude.
en
Cosmos, 1980

“Parfois, la pseudoscience est une espèce de maison de transition entre la vieille religion et la science nouvelle, dont tous les deux se méfient.”

Carl Sagan livre The Demon-Haunted World

Sometimes [Pseudoscience] is a kind of halfway house between old religion and new science, mistrusted by both.
en
The Demon-Haunted World (1995)

“Nous sommes comme des papillons qui battent des ailes pendant un jour en pensant que c'est l'éternité.”

Carl Sagan livre Cosmos

We are like butterflies who flutter for a day and think it is forever.
en
Cosmos, 1980

“99 pour cent de l'atmosphère de la Terre est d'origine biologique. Le ciel est fait de vie.”

Carl Sagan livre Cosmos

99 per cent of the Earth's atmosphere is of biological origin. The sky is made by life.
en
Cosmos, 1980

Carl Sagan: Citations en anglais

“The chiliasts made an atheist out of me.”

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Carl Sagan livre Contact

Source: Contact (1985), Chapter 15 (p. 258)

“They (i. e., the Pythagoreans) did not advocate the free confrontation of conflicting points of view. Instead, like all orthodox religions, they practised a rigidity that prevented them from correcting their errors.”

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Carl Sagan livre Cosmos

Source: Cosmos (1980), p. 184

“If there's nothing in here but atoms, does that make us less or does that make matter more?”

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Carl Sagan

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

“The suppression of uncomfortable ideas may be common in religion and politics, but it is not the path to knowledge; it has no place in the endeavor of science.”

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Carl Sagan livre Cosmos

Source: Cosmos (1980), p. 91

“Evolving before our eyes has been a God of the Gaps; that is, whatever it is we cannot explain lately is attributed to God.”

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Carl Sagan

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

“For a long time the human instinct to understand was thwarted by facile religious explanations.”

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Carl Sagan livre Cosmos

Source: Cosmos (1980), p. 173

“Since, in the long run, every planetary society 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 imaginable: staying alive.”

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Carl Sagan livre Pale Blue Dot

Source: Pale Blue Dot: A Vision of the Human Future in Space (1994), p. 371

“The major religions on the Earth contradict each other left and right. You can’t all be correct. And what if all of you are wrong? It’s a possibility, you know. You must care about the truth, right? Well, the way to winnow through all the differing contentions is to be skeptical. I’m not any more skeptical about your religious beliefs than I am about every new scientific idea I hear about. But in my line of work, they’re called hypotheses, not inspiration and not revelation.”

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Carl Sagan livre Contact

Source: Contact (1985), Chapter 10 (p. 162)

“She too had found the experience transforming. How could she not? A demon had been exorcised. Several. And just when she felt more capable of love than she had ever been, she found herself alone.”

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Carl Sagan livre Contact

Source: Contact (1985), Chapter 23 (p. 407)

“The old man made himself look hard at the Raven and saw that it was not a great bird from the sky but the work of men like himself. This first encounter turned out to be peaceful. The men of the La Pérouse expedition were under strict orders to treat with respect any people they might discover, an exceptional policy for its time and after.”

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Carl Sagan

4 min 40 sec
Cosmos: A Personal Voyage (1990 Update), Who Speaks for Earth? [Episode 13]

“We find a set of data that strongly implies the presence of complex organic molecules in the outer solar system.”

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Carl Sagan

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

“If we seek… nature, then love can be informed by truth instead of being based on ignorance or self-deception.”

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Carl Sagan

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

“If you take a look at science in its everyday function, of course you find that scientists run the gamut of human emotions and personalities and character and so on. But there’s one thing that is really striking to the outsider, and that is the gauntlet of criticism that is considered acceptable or even desirable. The poor graduate student at his or her Ph. D. oral exam is subjected to a withering crossfire of questions that sometimes seem hostile or contemptuous; this from the professors who have the candidate’s future in their grasp. The students naturally are nervous; who wouldn’t be? True, they’ve prepared for it for years. But they understand that at that critical moment they really have to be able to answer questions. So in preparing to defend their theses, they must anticipate questions; they have to think, “Where in my thesis is there a weakness that someone else might find — because I sure better find it before they do, because if they find it and I'm not prepared, I'm in deep trouble."”

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Carl Sagan

Wonder and Skepticism
Skeptical Inquirer
19
1
1995
January-February
0194-6730
http://www.csicop.org/si/show/wonder_and_skepticism/

“There is in the lovely Martian landscape not a footprint, not an artifact, not even an old beer can, not a blade of grass, not a kangaroo rat, not even, so far as we can tell, a microbe. Mars and the Moon and Venus… the only planets that we've landed on—are utterly lifeless. …in our solar system we may discover that there is life only on this world. This says that life is not guaranteed, that life requires something special, something improbable.”

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Carl Sagan

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

“Let’s see if I’ve got this straight,” he returned. It was a phrase of hers that he had adopted “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 good time or don’t they?”

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Carl Sagan livre Contact

Source: Contact (1985), Chapter 9 (p. 154)

“I stress that the universe is made mostly of nothing, that something is the exception.”

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Carl Sagan

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

“Once upon a time, the best minds of the human species believed that the planets were attached to crystal spheres. …Both in classic and in medieval times, it was prominently speculated that gods or angels propelled them, gave them a twirl every now and then. The Newtonian gravitational superstructure replaced angels with GMm/r2… as science advances, there seems to be less and less for God to do.”

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Carl Sagan

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

“Carbonaceous meteorites that fall to the Earth… have several percent to as much as 10 percent of complex organic matter in them.”

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Carl Sagan

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

“This is Phobos… Its mean density is known, and it is consistent with organic matter. Deimos… same story.”

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Carl Sagan

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

“In some respects, science has far surpassed religion in delivering awe. 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. God must be even greater than we dreamed"? Instead they say, "No, no, no! My god is a little god, and I want him to stay that way."”

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Carl Sagan livre Pale Blue Dot

Source: Pale Blue Dot: A Vision of the Human Future in Space (1994), p. 50

“If I were to propose to you that my arm could be in this position or in that position but it would be forbidden by the laws of nature to be in some intermediate position, that would likely strike you as absurd, as contrary to experience. And yet on the subatomic level, there is a quantization of energy and position and momentum. The reason that it seems counterintuitive is that is that we are not ordinarily down at the level of the very small, where quantum effects dominate.”

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Carl Sagan

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

“War is murder writ large.”

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Carl Sagan livre Cosmos

Source: Cosmos (1980), p. 326

“Our loyalties are to the species and the planet. We speak for Earth. Our obligation to survive and flourish is owed not just to ourselves, but also to that Cosmos, ancient and vast, from which we spring.”

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Carl Sagan

54 min 25 sec
Cosmos: A Personal Voyage (1990 Update), Who Speaks for Earth? [Episode 13]

“What counts is not what sounds plausible, not what we would like to believe, not what one or two witnesses claim, but only what is supported by hard evidence rigorously and skeptically examined. Extraordinary claims require extraordinary evidence.”

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Carl Sagan

1 min 10 sec
Cosmos: A Personal Voyage (1990 Update), Encyclopedia Galactica [Episode 12]

“For as long as there been humans we have searched for our place in the cosmos. Where are we? Who are we? We find that we live on an insignificant planet of a hum-drum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people. This perspective is a courageous continuation of our penchant for constructing and testing mental models of the skies; the Sun as a red-hot stone, the stars as a celestial flame, the Galaxy as the backbone of night.”

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Carl Sagan livre Cosmos

Source: Cosmos (1980), p. 193

“We are set irrevocably, I believe, on a path that will take us to the stars—unless in some monstrous capitulation to stupidity and greed, we destroy ourselves first.”

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Carl Sagan livre Broca's Brain

Source: Broca's Brain (1979), Chapter 25, “The Amniotic Universe” (p. 368)

“In any case, we do not advance the human cause by refusing to consider ideas that make us frightened.”

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Carl Sagan livre Broca's Brain

Source: Broca's Brain (1979), Chapter 25, “The Amniotic Universe” (p. 364)

“It is a good idea not to make up our minds prematurely on this issue. It is probably best not to let our personal preferences influence the decision. Rather, in the long tradition of successful science, we should permit nature to reveal the truth to us.”

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Carl Sagan livre Broca's Brain

Source: Broca's Brain (1979), Chapter 24, “Gott and the Turtles” (p. 351)

“Proponents of doctrinal religions—ones in which a particular body of belief is prized and infidels scorned—will be threatened by the courageous pursuit of knowledge. We hear from such people that it may be dangerous to probe too deeply. Many people have inherited their religion like their eye color: they consider it not a thing to think very deeply about, and in any case beyond our control. But those with a set of beliefs they profess to feel deeply about, which they have selected without an unbiased sifting through the facts and the alternatives, will feel uncomfortably challenged by searching questions. Anger at queries about our beliefs is the body’s warning signal: here lies unexamined and probably dangerous doctrinal baggage.”

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Carl Sagan livre Broca's Brain

Source: Broca's Brain (1979), Chapter 23, “A Sunday Sermon” (pp. 339-340)

“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. We cannot begin with an entirely clean slate, since we arrive at this problem with predispositions of hereditary and environmental origin; but, after understanding such built-in biases, is it not possible to pry insights from nature?”

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Carl Sagan livre Broca's Brain

Source: Broca's Brain (1979), Chapter 23, “A Sunday Sermon” (p. 339)

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