Carl Sagan: Quotes about science (page 2)

Carl Sagan was American astrophysicist, cosmologist, author and science educator. Explore interesting quotes on science.
Carl Sagan: 730   quotes 50   likes

“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.”

Carl Sagan book The Demon-Haunted World

Source: The Demon-Haunted World: Science as a Candle in the Dark

Religion , Way , Business , Knowledge

“Skeptical scrutiny is the means, in both science and religion, by which deep thoughts can be winnowed from deep nonsense.”

Carl Sagan
Religion , Science

“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.”

Carl Sagan book Cosmos

33 min 20 sec
Source: Cosmos: A Personal Voyage (1990 Update), Heaven and Hell [Episode 4]
Context: There are many hypotheses in science that are wrong. That's perfectly alright; it's the aperture to finding out what's right. Science is a self-correcting process. To be accepted, new ideas must survive the most rigorous standards of evidence and scrutiny.
Context: There are many hypotheses in science that are wrong. That's perfectly alright; it's the aperture to finding out what's right. Science is a self-correcting process. To be accepted, new ideas must survive the most rigorous standards of evidence and scrutiny. The worst aspect of the Velikovsky affair is not that many of his ideas were wrong or silly or in gross contradiction to the facts; rather, the worst aspect is that some scientists attempted to suppress Velikovsky's ideas. The suppression of uncomfortable ideas may be common in religion or in politics, but it is not the path to knowledge and there is no place for it in the endeavor of science. We do not know beforehand where fundamental insights will arise from about our mysterious and lovely solar system, and the history of our study of the solar system shows clearly that accepted and conventional ideas are often wrong and that fundamental insights can arise from the most unexpected sources.

Science

“Science is only a Latin word for knowledge”

Carl Sagan

Source: The Varieties of Scientific Experience: A Personal View of the Search for God

Knowledge , Science

“Modern science has been a voyage into the unknown, with a lesson in humility waiting at every stop. Many passengers would rather have stayed home.”

Carl Sagan book Pale Blue Dot

Pale Blue Dot: A Vision of the Human Future in Space (1994)

Home , Science , Waiting

“Think of how many religions attempt to validate themselves with prophecy. Think of how many people rely on these prophecies, however vague, however unfulfilled, to support or prop up their beliefs. Yet has there ever been a religion with the prophetic accuracy and reliability of science? … No other human institution comes close.”

Carl Sagan

Source: The Demon-Haunted World : Science as a Candle in the Dark (1995), Ch. 2 : Science and Hope, p. 30

People , Religion , Support , Thinking

“We can’t just conclude that science puts too much power into the hands of morally feeble technologists or corrupt, power-crazed politicians and decide to get rid of it. Advances in medicine and agriculture have saved more lives than have been lost in all the wars in history. Advances in transportation, communication, and entertainment have transformed the world. The sword of science is double-edged.”

Carl Sagan

"Why We Need To Understand Science" in The Skeptical Inquirer Vol. 14, Issue 3 (Spring 1990)
Context: I know that science and technology are not just cornucopias pouring good deeds out into the world. Scientists not only conceived nuclear weapons; they also took political leaders by the lapels, arguing that their nation — whichever it happened to be — had to have one first. … There’s a reason people are nervous about science and technology.
And so the image of the mad scientist haunts our world—from Dr. Faust to Dr. Frankenstein to Dr. Strangelove to the white-coated loonies of Saturday morning children’s television. (All this doesn’t inspire budding scientists.) But there’s no way back. We can’t just conclude that science puts too much power into the hands of morally feeble technologists or corrupt, power-crazed politicians and decide to get rid of it. Advances in medicine and agriculture have saved more lives than have been lost in all the wars in history. Advances in transportation, communication, and entertainment have transformed the world. The sword of science is double-edged. Rather, its awesome power forces on all of us, including politicians, a new responsibility — more attention to the long-term consequences of technology, a global and transgenerational perspective, an incentive to avoid easy appeals to nationalism and chauvinism. Mistakes are becoming too expensive.

War , World , History , Communication

“Eratosthenes was the director of the great library of Alexandria, the Centre of science and learning in the ancient world. Aristotle had argued that humanity was divided into Greeks and everybody else, whom he called barbarians and that the Greeks should keep themselves racially pure. He thought it was fitting for the Greeks to enslave other peoples. But Eratosthenes criticized Aristotle for his blind chauvinism, he believed there was good and bad in every nation.”

Carl Sagan

25 Min 10 Sec
Cosmos: A Personal Voyage (1990 Update), Who Speaks for Earth? [Episode 13]

People , World , Learning , Science

“That kind of skeptical, questioning, "don't accept what authority tells you" attitude of science — is also nearly identical to the attitude of mind necessary for a functioning democracy. Science and democracy have very consonant values and approaches, and I don't think you can have one without the other.”

Carl Sagan

Talk of the Nation (3 May 1996)

Democracy , Question , Thinking , Science

“There is no other species on the Earth that does science. It is, so far, entirely a human invention, evolved by natural selection in the cerebral cortex for one simple reason: it works. It is not perfect. It can be misused. It is only a tool. But it is by far the best tool we have, self-correcting, ongoing, applicable to everything. It has two rules. First: there are no sacred truths; all assumptions must be critically examined; arguments from authority are worthless. Second: whatever is inconsistent with the facts must be discarded or revised. We must understand the Cosmos as it is and not confuse how it is with how we wish it to be.”

Carl Sagan book Cosmos

Source: Cosmos (1980), p. 333

Truth , Understanding , Nature , Science

“In science it often happens that scientists say, "You know that's a really good argument; my position is mistaken," and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.”

Carl Sagan

Keynote address at CSICOP conference (1987), as quoted in Do Science and the Bible Conflict? (2003) by Judson Poling, p. 30

Pain , Religion , Science , Change

“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.”

Carl Sagan

Source: Billions and Billions: Thoughts on Life and Death at the Brink of the Millenium (1997), Chapter 14, "The Common Enemy".

Understanding , Freedom , Science

“Humans may crave absolute certainty; they may aspire to it; they may pretend, as partisans of certain religions do, to have attained it. But the history of science — by far the most successful claim to knowledge accessible to humans — 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

Source: The Demon-Haunted World : Science as a Candle in the Dark (1995), Ch. 2 : Science and Hope, p. 28

Religion , Hope , History , Understanding

“Instead of wanting everyone to share and know of their discoveries the Pythagoreans suppressed the square root of two and the dodecahedron. The outside world was not to know. The Pythagoreans had discovered, in the mathematical underpinnings of nature, one of the two most powerful scientific tools, the other of course is experiment, but instead of using their insight to advance the collective voyage of human discovery they made of it little more than the hocus-pocus of a mystery cult. Science and mathematics were to be removed from the hands of the merchants and the artisans.”

Carl Sagan

38 min 10 sec
Cosmos: A Personal Voyage (1990 Update), The Backbone of Night [Episode 7]

World , Mathematics , Nature , Science

“The enterprise of knowledge is consistent surely with science; it should be with religion, and it is essential for the welfare of the human species.”

Carl Sagan

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

Religion , Knowledge , Science

“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.”

Carl Sagan book Cosmos

Source: Cosmos (1980), p. 91

Religion , Idea , Knowledge , Science

“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."”

Carl Sagan

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

Hostility , Understanding , Question , Nature

“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.”

Carl Sagan

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

God , Angels , Science , Time

“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."”

Carl Sagan book Pale Blue Dot

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

God , Religion , Dreams , Way