Richard Feynman citáty (187 citátov, page 4) | Citáty slávnych osobností

Richard Feynman: 187 citátov 28 Páči sa

Richard Feynman najznámejšie citáty

„Fyzika sa má k matematike tak, ako se má sex k masturbácii.“

Richard Feynman

Physics is to math what sex is to masturbation.
Prisudzované výroky

„Einstein bol génius, hlava v oblakoch, noha na zemi. Ale tí z nás, ktorí tak vysokí nie sú, tí si musia vybrať.“

Richard Feynman

Einstein was a genius: Head in the clouds, feet on the ground. But those of us who are not as tall, have to make a choice.
Prisudzované výroky

„Boh bol vynájdený na vysvetlenie záhady. Boh je vždy vymyslený na vysvetlenie tých vecí, ktorým nerozumiete.“

Richard Feynman

God was invented to explain mystery. God is always invented to explain those things that you do not understand.
Citácia v: Superstrings: A Theory of Everything? (1988) autor: Paul C. W. Davies; autor: Julian R. Brown, str. 208-209, ISBN 0521354625
Potvrdené výroky

„V galaxii je 10^11 hviezd. Kedysi to bývalo skutočne veľké číslo. Ale je to len 100 miliárd, to je menej než schodok štátneho rozpočtu. Takým číslam sme hovorili astronomické, teraz im môžeme hovoriť ekonomické.“

Richard Feynman

There are 1011 stars in the galaxy. That used to be a huge number. But it's only a hundred billion. It's less than the national deficit! We used to call them astronomical numbers. Now we should call them economical numbers.
Prisudzované výroky

„Fyzika je ako sex, môže priniesť praktické výsledky, ale to nie je to, prečo to robíme.“

Richard Feynman

Physics is like sex. Sure, it may give some practical results, but that's not why we do it.
Prisudzované výroky

„Prvou zásadou je, že nesmiete oklamať sami seba - a práve seba je najľahšie oklamať.“

Richard Feynman

Richard Feynman: Citáty v angličtine

“I do feel strongly that this is nonsense! … So perhaps I could entertain future historians by saying I think all this superstring stuff is crazy and is in the wrong direction. I think all this superstring stuff is crazy and is in the wrong direction. … I don’t like it that they’re not calculating anything. … why are the masses of the various particles such as quarks what they are? All these numbers … have no explanations in these string theories – absolutely none! … I don’t like that they don’t check their ideas. I don’t like that for anything that disagrees with an experiment, they cook up an explanation—a fix-up to say, “Well, it might be true.” For example, the theory requires ten dimensions. Well, maybe there’s a way of wrapping up six of the dimensions. Yes, that’s all possible mathematically, but why not seven? When they write their equation, the equation should decide how many of these things get wrapped up, not the desire to agree with experiment. In other words, there’s no reason whatsoever in superstring theory that it isn’t eight out of the ten dimensions that get wrapped up and that the result is only two dimensions, which would be completely in disagreement with experience. So the fact that it might disagree with experience is very tenuous, it doesn’t produce anything.”

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Richard Feynman

interview published in Superstrings: A Theory of Everything? (1988) edited by Paul C. W. Davies and Julian R. Brown, p. 193-194

“You know, the most amazing thing happened to me tonight. I was coming here, on the way to the lecture, and I came in through the parking lot. And you won't believe what happened. I saw a car with the license plate ARW 357. Can you imagine? Of all the millions of license plates in the state, what was the chance that I would see that particular one tonight? Amazing!”

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Richard Feynman

from a public lecture, as quoted in David L. Goodstein, "Richard P. Feynman, Teacher," Physics Today, volume 42, number 2 (February 1989) p. 70-75, at p. 73
Republished in the "Special Preface" to Six Easy Pieces (1995), p. xxi.
Republished also in the "Special Preface" to the "definitive edition" of The Feynman Lectures on Physics, volume I, p. xiv.

“A person talks in such generalities that everyone can understand him and it's considered to be some deep philosophy. However, I would like to be very rather more special and I would like to be understood in an honest way, rather than in a vague way.”

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Richard Feynman kniha The Character of Physical Law

Zdroj: The Character of Physical Law (1965), chapter 1, “The Law of Gravitation,” p. 13: video http://www.youtube.com/watch?v=j3mhkYbznBk&t=7m53s

“My mother … had a wonderful sense of humor, and I learned from her that the highest forms of understanding we can achieve are laughter and human compassion.”

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Richard Feynman kniha What Do You Care What Other People Think?

"The Making of a Scientist," p. 19
What Do You Care What Other People Think? (1988)

“So far as we know, all the fundamental laws of physics, like Newton’s equations, are reversible.”

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Richard Feynman

volume I; lecture 46, "Ratchet and Pawl"; section 46-5, "Order and entropy"; p. 46-8
The Feynman Lectures on Physics (1964)

“The imagination of nature is far, far greater than the imagination of man.”

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Richard Feynman

The Value of Science (1955)

“Perhaps you will not only have some appreciation of this culture; it is even possible that you may want to join in the greatest adventure that the human mind has ever begun.”

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Richard Feynman

volume III, "Feynman's Epilogue", p. 21-19 (closing sentence)
The Feynman Lectures on Physics (1964)

“We absolutely must leave room for doubt or there is no progress and no learning. There is no learning without having to pose a question. And a question requires doubt. People search for certainty. But there is no certainty. People are terrified — how can you live and not know? It is not odd at all. You only think you know, as a matter of fact. And most of your actions are based on incomplete knowledge and you really don't know what it is all about, or what the purpose of the world is, or know a great deal of other things. It is possible to live and not know.”

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Richard Feynman kniha The Pleasure of Finding Things Out

from lecture "What is and What Should be the Role of Scientific Culture in Modern Society", given at the Galileo Symposium in Italy (1964)
The Pleasure of Finding Things Out (1999)

“Incidentally, psychoanalysis is not a science: it is at best a medical process, and perhaps even more like witch-doctoring. It has a theory as to what causes disease—lots of different “spirits,” etc. The witch doctor has a theory that a disease like malaria is caused by a spirit which comes into the air; it is not cured by shaking a snake over it, but quinine does help malaria. So, if you are sick, I would advise that you go to the witch doctor because he is the man in the tribe who knows the most about the disease; on the other hand, his knowledge is not science. Psychoanalysis has not been checked carefully by experiment.”

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Richard Feynman

volume I; lecture 3, "The Relation of Physics to Other Sciences"; section 3-6, "Psychology"; p. 3-8
The Feynman Lectures on Physics (1964)

“Energy is a very subtle concept. It is very, very difficult to get right.”

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Richard Feynman

address " What is Science? http://www.fotuva.org/feynman/what_is_science.html", presented at the fifteenth annual meeting of the National Science Teachers Association, in New York City (1966), published in The Physics Teacher, volume 7, issue 6 (1969), p. 313-320

“I don't like honors. … I've already got the prize: the prize is the pleasure of finding the thing out, the kick in the discovery, the observation that other people use it. Those are the real things.”

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Richard Feynman kniha The Pleasure of Finding Things Out

Zdroj: No Ordinary Genius (1994), p. 82, from interview in "The Pleasure of Finding Things Out" (1981): video http://www.youtube.com/watch?v=NEwUwWh5Xs4&t=24m55s

“Since then I never pay attention to anything by "experts". I calculate everything myself.”

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Richard Feynman

After having been led astray on neutron-proton coupling by reports of "beta-decay experts".
Part 5: "The World of One Physicist", "The 7 Percent Solution", p. 255
Surely You're Joking, Mr. Feynman! (1985)

“Do not read so much, look about you and think of what you see there.”

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Richard Feynman

letter to Ashok Arora, 4 January 1967, published in Perfectly Reasonable Deviations from the Beaten Track (2005) p. 230

“The Quantum Universe has a quotation from me in every chapter — but it's a damn good book anyway.”

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Richard Feynman

Review blurb for the first edition of The Quantum Universe http://www.cambridge.org/catalogue/catalogue.asp?isbn=0521564573 (1987)

“To those who do not know mathematics it is difficult to get across a real feeling as to the beauty, the deepest beauty, of nature. … If you want to learn about nature, to appreciate nature, it is necessary to understand the language that she speaks in.”

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Richard Feynman kniha The Character of Physical Law

Zdroj: The Character of Physical Law (1965), chapter 2, “The Relation of Mathematics to Physics,” p. 58

“Every instrument that has been designed to be sensitive enough to detect weak light has always ended up discovering that the same thing: light is made of particles.”

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Richard Feynman kniha QED: The Strange Theory of Light and Matter

Zdroj: QED: The Strange Theory of Light and Matter (1985), p. 15

“I took this stuff I got out of your [O-ring] seal and I put it in ice water, and I discovered that when you put some pressure on it for a while and then undo it it doesn't stretch back. It stays the same dimension. In other words, for a few seconds at least, and more seconds than that, there is no resilience in this particular material when it is at a temperature of 32 degrees. I believe that has some significance for our problem.”

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Richard Feynman

statement at hearing by Rogers Commission, 11 February 1986, Report of the PRESIDENTIAL COMMISSION on the Space Shuttle Challenger Accident, volume 4, p. 680 http://history.nasa.gov/rogersrep/v4part4.htm#4; also quoted in Genius: The Life and Science of Richard Feynman (1992) by James Gleick, p. 423

“If we suppress all discussion, all criticism, proclaiming "This is the answer, my friends; man is saved!" we will doom humanity for a long time to the chains of authority, confined to the limits of our present imagination. It has been done so many times before.”

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Richard Feynman

The Value of Science (1955)
Kontext: We are at the very beginning of time for the human race. It is not unreasonable that we grapple with problems. But there are tens of thousands of years in the future. Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on.
... It is our responsibility to leave the people of the future a free hand. In the impetuous youth of humanity, we can make grave errors that can stunt our growth for a long time. This we will do if we say we have the answers now, so young and ignorant as we are. If we suppress all discussion, all criticism, proclaiming "This is the answer, my friends; man is saved!" we will doom humanity for a long time to the chains of authority, confined to the limits of our present imagination. It has been done so many times before.
... It is our responsibility as scientists, knowing the great progress which comes from a satisfactory philosophy of ignorance, the great progress which is the fruit of freedom of thought, to proclaim the value of this freedom; to teach how doubt is not to be feared but welcomed and discussed; and to demand this freedom as our duty to all coming generations.

“It is a great adventure to contemplate the universe, beyond man, to contemplate what it would be like without man, as it was in a great part of its long history and as it is in a great majority of places. When this objective view is finally attained, and the mystery and majesty of matter are fully appreciated, to then turn the objective eye back on man viewed as matter, to view life as part of this universal mystery of greatest depth, is to sense an experience which is very rare, and very exciting. It usually ends in laughter and a delight in the futility of trying to understand what this atom in the universe is, this thing — atoms with curiosity — that looks at itself and wonders why it wonders. Well, these scientific views end in awe and mystery, lost at the edge in uncertainty, but they appear to be so deep and so impressive that the theory that it is all arranged as a stage for God to watch man's struggle for good and evil seems inadequate.”

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Richard Feynman kniha The Meaning of It All

lecture II: "The Uncertainty of Values"
The Meaning of It All (1999)

“If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generation of creatures, what statement would contain the most information in the fewest words? I believe it is the atomic hypothesis (or the atomic fact, or whatever you wish to call it) that all things are made of atoms — little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another. In that one sentence, you will see, there is an enormous amount of information about the world, if just a little imagination and thinking are applied.”

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Richard Feynman

volume I; lecture 1, "Atoms in Motion"; section 1-2, "Matter is made of atoms"; p. 1-2
The Feynman Lectures on Physics (1964)

“When you're thinking about something that you don't understand, you have a terrible, uncomfortable feeling called confusion. It's a very difficult and unhappy business. And so most of the time you're rather unhappy, actually, with this confusion. You can't penetrate this thing. Now, is the confusion's because we're all some kind of apes that are kind of stupid working against this, trying to figure out [how] to put the two sticks together to reach the banana and we can't quite make it, the idea? And I get this feeling all the time that I'm an ape trying to put two sticks together, so I always feel stupid. Once in a while, though, the sticks go together on me and I reach the banana.”

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Richard Feynman

Video interview http://www.youtube.com/watch?v=lytxafTXg6c dated 1963

“I believe in limited government. I believe that government should be limited in many ways, and what I am going to emphasize is only an intellectual thing. I don't want to talk about everything at the same time. Let's take a small piece, an intellectual thing.No government has the right to decide on the truth of scientific principles, nor to prescribe in any way the character of the questions investigated. Neither may a government determine the aesthetic value of artistic creations, nor limit the forms of literary or artistic expression. Nor should it pronounce on the validity of economic, historic, religious, or philosophical doctrines. Instead it has a duty to its citizens to maintain the freedom, to let those citizens contribute to the further adventure and the development of the human race.”

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Richard Feynman kniha The Meaning of It All

lecture II: "The Uncertainty of Values"
The Meaning of It All (1999)

“While in Kyoto I tried to learn Japanese with a vengeance. I worked much harder at it, and got to a point where I could go around in taxis and do things. I took lessons from a Japanese man every day for an hour.
One day he was teaching me the word for "see." "All right," he said. "You want to say, 'May I see your garden?' What do you say?"
I made up a sentence with the word that I had just learned.
"No, no!" he said. "When you say to someone, 'Would you like to see my garden?' you use the first 'see.' But when you want to see someone else's garden, you must use another 'see,' which is more polite."
"Would you like to glance at my lousy garden?" is essentially what you're saying in the first case, but when you want to look at the other fella's garden, you have to say something like, "May I observe your gorgeous garden?" So there's two different words you have to use.
Then he gave me another one: "You go to a temple, and you want to look at the gardens…"
I made up a sentence, this time with the polite "see."
"No, no!" he said. "In the temple, the gardens are much more elegant. So you have to say something that would be equivalent to 'May I hang my eyes on your most exquisite gardens?"
Three or four different words for one idea, because when I'm doing it, it's miserable; when you're doing it, it's elegant.
I was learning Japanese mainly for technical things, so I decided to check if this same problem existed among the scientists.
At the institute the next day, I said to the guys in the office, "How would I say in Japanese, 'I solve the Dirac Equation'?"
They said such-and-so.
"OK. Now I want to say, 'Would you solve the Dirac Equation?'”

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Richard Feynman

how do I say that?"
"Well, you have to use a different word for 'solve,' " they say.
"Why?" I protested. "When I solve it, I do the same damn thing as when you solve it!"
"Well, yes, but it's a different word — it's more polite."
I gave up. I decided that wasn't the language for me, and stopped learning Japanese.
Part 5: "The World of One Physicist", "Would <U>You</U> Solve the Dirac Equation?", p. 245-246
Surely You're Joking, Mr. Feynman! (1985)

“Anyway, I have to argue about flying saucers on the beach with people, you know. And I was interested in this: they keep arguing that it is possible. And that's true. It is possible. They do not appreciate that the problem is not to demonstrate whether it's possible or not but whether it's going on or not.”

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Richard Feynman kniha The Meaning of It All

lecture III: "This Unscientific Age"
The Meaning of It All (1999)

“We scientists are clever — too clever — are you not satisfied? Is four square miles in one bomb not enough? Men are still thinking. Just tell us how big you want it!”

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Richard Feynman

note (c. 1945), quoted in Genius: The Life and Science of Richard Feynman (1992) by James Gleick, p. 204

“The electron is a theory we use; it is so useful in understanding the way nature works that we can almost call it real.”

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Richard Feynman

Part 2: "The Princeton Years", "A Map of the Cat?", p. 70
Surely You're Joking, Mr. Feynman! (1985)

“The third aspect of my subject is that of science as a method of finding things out. This method is based on the principle that observation is the judge of whether something is so or not. All other aspects and characteristics of science can be understood directly when we understand that observation is the ultimate and final judge of the truth of an idea. But "prove" used in this way really means "test," in the same way that a hundred-proof alcohol is a test of the alcohol, and for people today the idea really should be translated as, "The exception tests the rule." Or, put another way, "The exception proves that the rule is wrong."”

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Richard Feynman kniha The Meaning of It All

That is the principle of science. If there is an exception to any rule, and if it can be proved by observation, that rule is wrong.
lecture I: "The Uncertainty of Science"
The Meaning of It All (1999)