Carl Sagan citations célèbres
“Des affirmations extraordinaires nécessitent des preuves extraordinaires.”
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
[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.”
You are made of a hundred trillion cells. We are, each of us, a multitude.
en
Cosmos, 1980
Sometimes [Pseudoscience] is a kind of halfway house between old religion and new science, mistrusted by both.
en
The Demon-Haunted World (1995)
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.”
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
Source: The Demon-Haunted World: Science as a Candle in the Dark
“It’s hard to kill a creature once it lets you see its consciousness.”
Source: Contact (1985), Chapter 9 (p. 147)
Source: Pale Blue Dot: A Vision of the Human Future in Space (1994), p. 8, Supplemental image at randi.org http://www.randi.org/images/122801-BlueDot.jpg
Contexte: 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. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.
Contexte: Consider again 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. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar", every "supreme leader", every saint and sinner in the history of our species lived there — on a mote of dust suspended in a sunbeam.
The Earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that, in glory and triumph, they could become the momentary masters of a fraction of a dot. Think of the endless cruelties visited by the inhabitants of one corner of this pixel on the scarcely distinguishable inhabitants of some other corner, how frequent their misunderstandings, how eager they are to kill one another, how fervent their hatreds.
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. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.
The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment the Earth is where we make our stand.
It has been said that astronomy is a humbling and character-building experience. There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world. To me, it underscores our responsibility to deal more kindly with one another, and to preserve and cherish the pale blue dot, the only home we've ever known.
Source: From the book The Demon-Haunted World Sagan quoting from Kenneth V. Lanning, FBI Behavioral Science Research Unit, from an article Satanic, Occult and Ritualistic Crime in The Police Chief, Oct 1989 note: Misattributed
“There are wonders enough out there without our inventing any.”
Source: The Demon-Haunted World: Science as a Candle in the Dark
“Sailors on a becalmed sea, we sense the stirring of a breeze.”
Source: Pale Blue Dot: A Vision of the Human Future in Space
Source: The Demon-Haunted World: Science as a Candle in the Dark
"Why We Need To Understand Science" in The Skeptical Inquirer Vol. 14, Issue 3 (Spring 1990) http://www.csicop.org/si/show/why_we_need_to_understand_science
“The Cosmos is all that is or ever was or ever will be.”
p. 4
Source: The Cosmos is all that is or ever 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.
53 min 54 sec
Source: We are the local embodiment of a Cosmos grown to selfawareness. We have begun to contemplate our origins: starstuff pondering the stars; organized assemblages of ten billion billion billion atoms considering the evolution of atoms; tracing the long journey by which, here at least, consciousness arose. Our loyalties are to the species and the planet. We speak for Earth. Our obligation to survive is owed not just to ourselves but also to that Cosmos, ancient and vast, from which we spring.
Contexte: And we who embody the local eyes and ears and thoughts and feelings of the cosmos we've begun, at last, to wonder about our origins. Star stuff, contemplating the stars organized collections of 10 billion-billion-billion atoms contemplating the evolution of matter tracing that long path by which it arrived at consciousness here on the planet Earth and perhaps, throughout the cosmos.
Source: The Demon-Haunted World : Science as a Candle in the Dark (1995), Ch. 11 : The Dragon in My Garage, p. 180
Source: The Demon-Haunted World: Science as a Candle in the Dark
Contexte: 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. Really, it's okay to reserve judgment until the evidence is in.
