Stephen Hawking citations (132 citations, Page 4)

Selon le magazine La Recherche (numéro 370 de décembre 2003 à la page 34) http://www.larecherche.fr/savoirs/epistemologie/univers-est-il-intelligible-01-12-2003-84130, la formulation correcte est : L'éternellement incompréhensible à propos du monde est sa compréhensibilité.
Albert Einstein, Physique et réalité, 1936.
Y a-t-il un grand architecte dans l'univers ?, 2011

recherche , réalité , univers , monde

“J'utilise le mot Dieu dans un sens impersonnel, comme Einstein le faisait pour les lois de la nature.”

Stephen Hawking

Question de sciences et vie : A plusieurs reprises, dans votre livre, vous mentionnez Dieu. Qu'entendez-vous exactement par Dieu ?

nature , Dieu , loi , Sens

“Le déterminisme de Laplace était incomplet de deux façons. Il n'indiquait pas comment les lois devaient être choisies et il ne spécifiait pas la configuration initiale de l'univers. Cela était laissé à Dieu. (…) Le principe d'incertitude de la mécanique quantique implique que certaines paires de quantités, comme la position et la vitesse d'une particule, ne peuvent être toutes deux prédites avec une complète exactitude : les particules n'ont pas de positions ni de vitesses bien définies mais sont représentées par une onde. Ces théories quantiques sont déterministes au sens où elles donnent des lois pour l'évolution de l'onde dans le temps.”

Stephen Hawking livre Une brève histoire du temps

fr
Une brève histoire du temps, 1989

univers , temps , vitesse , Dieu

Stephen Hawking: Citations en anglais

“I'm sorry to disappoint science fiction fans, but if information is preserved, there is no possibility of using black holes to travel to other universes. If you jump into a black hole, your mass energy will be returned to our universe but in a mangled form which contains the information about what you were like but in a state where it can not be easily recognized. It is like burning an encyclopedia. Information is not lost, if one keeps the smoke and the ashes. But it is difficult to read. In practice, it would be too difficult to re-build a macroscopic object like an encyclopedia that fell inside a black hole from information in the radiation, but the information preserving result is important for microscopic processes involving virtual black holes.”

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Stephen Hawking

"Information Loss in Black Holes" http://arxiv.org/abs/hep-th/0507171 (July 2005)

“Equations are just the boring part of mathematics. I attempt to see things in terms of geometry.”

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Stephen Hawking

As quoted in Stephen Hawking: A Biography (2005) by Kristine Larsen, p. 43

“If we do discover a complete theory, it should in time be understandable in broad principle by everyone, not just a few scientists. Then we shall all, philosophers, scientists, and just ordinary people, be able to take part in the discussion of the question of why it is that we and the universe exist. If we find the answer to that, it would be the ultimate triumph of human reason — for then we would know the mind of God.”

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Stephen Hawking livre Black Holes and Baby Universes and Other Essays

Last lines. Hawking later wrote: "In the proof stage I nearly cut the last sentence in the book... Had I done so, the sales might have been halved.
Black Holes and Baby Universes and Other Essays (1993)

“I now predict that I was wrong.”

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Stephen Hawking

Attributed in the movie The Theory of Everything (2014)
Attributed

“The development of full artificial intelligence could spell the end of the human race. We cannot quite know what will happen if a machine exceeds our own intelligence, so we can't know if we'll be infinitely helped by it, or ignored by it and sidelined, or conceivably destroyed by it.”

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Stephen Hawking

BBC (2 December 2014) http://www.bbc.com/news/technology-30290540

“[on the possibility of contact with an alien civilization]: I think it would be a disaster. The extraterrestrials would probably be far in advance of us. The history of advanced races meeting more primitive people on this planet is not very happy, and they were the same species. I think we should keep our heads low.”

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Stephen Hawking

Appearance in the National Geographic Channel program Naked Science: Alien Contact, as quoted in The New York Times (24 November 2004) http://query.nytimes.com/gst/fullpage.html?res=9C00E2D8173EF937A15752C1A9629C8B63&sec=&spon= and a CNN transcript of an interview with Seth Shostak from Anderson Cooper 360 (26 November 2004) http://transcripts.cnn.com/TRANSCRIPTS/0411/26/acd.01.html

“Bodies like the earth are not made to move on curved orbits by a force called gravity; instead, they follow the nearest thing to a straight path in a curved space, which is called a geodesic. A geodesic is the shortest (or longest) path between two nearby points.”

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Stephen Hawking livre Une brève histoire du temps

Source: A Brief History of Time (1988), Ch. 2

“There ought to be something very special about the boundary conditions of the universe and what can be more special than that there is no boundary?”

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Stephen Hawking

As quoted in The Anthropic Cosmological Principle (1986) by John D. Barrow and Frank J. Tipler. p. 444

“It is a waste of time to be angry about my disability. One has to get on with life and I haven't done badly. People won't have time for you if you are always angry or complaining.”

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Stephen Hawking

As quoted in "Return of the time lord" in The Guardian (27 September 2005)

“Mathematics is more than a tool and language for science. It is also an end in itself, and as such, it has, over the centuries, affected our worldview in its own right.”

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Stephen Hawking livre God Created the Integers

Preface
God Created the Integers (2007)

“Although September 11 was horrible, it didn't threaten the survival of the human race, like nuclear weapons do.”

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Stephen Hawking

Interview "Colonies in space may be only hope, says Hawking" by Roger Highfield in Daily Telegraph (16 October 2001) http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2001/10/16/nhawk16.xml&sSheet=/news/2001/10/16/ixhome.html

“All my life, I have been fascinated by the big questions that face us, and have tried to find scientific answers to them.”

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Stephen Hawking

From the 1997 television program Stephen Hawking's Universe http://www.pbs.org/wnet/hawking/html/home.html
Unsourced variant: All of my life, I have been fascinated by the big questions that face us, and have tried to find scientific answers to them. Perhaps that is why I have sold more books on physics than Madonna has on sex. This quote seems to combine the above sentence from Stephen Hawking's Universe with a statement from the Foreword to The Illustrated Brief History of Time: As Nathan Myhrvold of Microsoft (a former post-doc of mine) remarked: I have sold more books on physics than Madonna has on sex.

“I think that it's important for scientists to explain their work, particularly in cosmology. This now answers many questions once asked of religion.”

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Stephen Hawking

As quoted in "Return of the time lord" in The Guardian (27 September 2005)

“We should seek the greatest value of our action.”

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Stephen Hawking

Response to a question on how we should live, in an interview with The Guardian (15 May 2011)

“When I gave a lecture in Japan, I was asked not to mention the possible re-collapse of the universe, because it might affect the stock market. However, I can re-assure anyone who is nervous about their investments that it is a bit early to sell: even if the universe does come to an end, it won't be for at least twenty billion years. By that time, maybe the GATT trade agreement will have come into effect.”

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Stephen Hawking

The Beginning of Time (1996)

“The life we have on Earth must have spontaneously generated itself. It must therefore be possible for life to generate spontaneously elsewhere in the universe.”

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Stephen Hawking

From an appearance in the Discovery Channel program Alien Planet (14 May 2005)

“Maybe that is our mistake: maybe there are no particle positions and velocities, but only waves. It is just that we try to fit the waves to our preconceived ideas of positions and velocities. The resulting mismatch is the cause of the apparent unpredictability.”

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Stephen Hawking livre Une brève histoire du temps

Source: A Brief History of Time (1988), Ch. 12

“We are each free to believe what we want and it is my view that the simplest explanation is there is no God. No one created the universe and no one directs our fate. This leads me to a profound realization. There is probably no heaven, and no afterlife either. We have this one life to appreciate the grand design of the universe, and for that, I am extremely grateful.”

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Stephen Hawking

Quoted from the Discovery Channel, 15 August 2011.
"Stephen Hawking There is no God. There is no Fate." from episode 1 https://www.youtube.com/watch?v=7L7VTdzuY7Y · [Curiosity: Did God Create the Universe?, http://dsc.discovery.com/tv-shows/curiosity/topics/did-god-create-the-universe.htm, Discovery Communications, LLC., 7 August 2011, 4 July 2013]
Curiosity (2011)

“The Steady State theory was what Karl Popper would call a good scientific theory: it made definite predictions, which could be tested by observation, and possibly falsified. Unfortunately for the theory, they were falsified.”

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Stephen Hawking

The Beginning of Time (1996)

“We hold these truths to be self-evident that all P-brains are created equal.”

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Stephen Hawking livre The Universe in a Nutshell

The Universe in a Nutshell (2001)

“In a world that is in chaos politically, socially and environmentally, how can the human race sustain another 100 years?”

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Stephen Hawking

Open question, posted to the Internet, as quoted in The Guardian, and "Watching the World" in Awake! magazine (June 2007); a month after posting the question he explained: I don’t know the answer. That is why I asked the question, to get people to think about it, and to be aware of the dangers we now face.

“The zero-G part was wonderful and the higher-G part was no problem. I could have gone on and on. Space, here I come!”

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Stephen Hawking

After completing a zero-gravity flight in a specially modified plane, as quoted in "Hawking takes zero-gravity flight" BBC News (27 April 2007) http://news.bbc.co.uk/1/hi/sci/tech/6594821.stm

“These lectures have shown very clearly the difference between Roger and me. He's a Platonist and I'm a positivist. He's worried that Schrödinger's cat is in a quantum state, where it is half alive and half dead. He feels that can't correspond to reality. But that doesn't bother me. I don't demand that a theory correspond to reality because I don't know what it is. Reality is not a quality you can test with litmus paper. All I'm concerned with is that the theory should predict the results of measurements. Quantum theory does this very successfully. It predicts that the result of an observation is either that the cat is alive or that it is dead. It is like you can't be slightly pregnant: you either are or you aren't.”

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Stephen Hawking livre The Nature of Space and Time

During a debate with Roger Penrose in 1994 at the Isaac Newton Institute for Mathematical Sciences at the University of Cambridge, transcribed in The Nature of Space and Time (1996) by Stephen Hawking and Roger Penrose, p. 121 http://books.google.com/books?id=LstaQTXP65cC&lpg=PP1&dq=nature%20of%20space%20and%20time&pg=PA121#v=onepage&q=&f=false

“Einstein was confused, not the quantum theory.”

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Stephen Hawking

Lecture at the Amsterdam Symposium on Gravity, Black Holes, and String Theory (21 June 1997)

“As scientists, we understand the dangers of nuclear weapons and their devastating effects, and we are learning how human activities and technologies are affecting climate systems in ways that may forever change life on Earth. As citizens of the world, we have a duty to alert the public to the unnecessary risks that we live with every day, and to the perils we foresee if governments and societies do not take action now to render nuclear weapons obsolete and to prevent further climate change… There’s a realization that we are changing our climate for the worse. That would have catastrophic effects. Although the threat is not as dire as that of nuclear weapons right now, in the long term we are looking at a serious threat.”

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Stephen Hawking

At a press conference for the Bulletin of the Atomic Scientists, as the Doomsday Clock is moved forward by two minutes to five minutes to midnight, as quoted in "Nukes, climate push 'Doomsday Clock' forward" MSNBC http://www.msnbc.msn.com/id/16670686/ (1 January 2007)

“If you are disabled, it is probably not your fault, but it is no good blaming the world or expecting it to take pity on you. One has to have a positive attitude and must make the best of the situation that one finds oneself in; if one is physically disabled, one cannot afford to be psychologically disabled as well. In my opinion, one should concentrate on activities in which one's physical disability will not present a serious handicap. I am afraid that Olympic Games for the disabled do not appeal to me, but it is easy for me to say that because I never liked athletics anyway. On the other hand, science is a very good area for disabled people because it goes on mainly in the mind. Of course, most kinds of experimental work are probably ruled out for most such people, but theoretical work is almost ideal. My disabilities have not been a significant handicap in my field, which is theoretical physics. Indeed, they have helped me in a way by shielding me from lecturing and administrative work that I would otherwise have been involved in. I have managed, however, only because of the large amount of help I have received from my wife, children, colleagues and students. I find that people in general are very ready to help, but you should encourage them to feel that their efforts to aid you are worthwhile by doing as well as you possibly can.”

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Stephen Hawking

"Handicapped People and Science" http://books.google.com/books?id=9LVFAAAAYAAJ&q=%22handicapped+people+and+science%22#search_anchor by Stephen Hawking, Science Digest 92, No. 9 (September 1984): 92 (details of citation from here http://www.enotes.com/stephen-hawking-criticism/hawking-stephen/further-reading).

“I'm not religious in the normal sense. I believe the universe is governed by the laws of science. The laws may have been decreed by God, but God does not intervene to break the laws.”

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Stephen Hawking

Quoted in "Stephen Hawking prepares for weightless flight", New Scientist (26 April 2007) http://www.newscientist.com/article/dn11722-stephen-hawking-prepares-for-weightless-flight.html

“The world has changed far more in the past 100 years than in any other century in history. The reason is not political or economic but technological — technologies that flowed directly from advances in basic science.”

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Stephen Hawking

From Hawking's article A Brief History of Relativity http://www.time.com/time/magazine/article/0,9171,993018-6,00.html, in Time magazine (31 December 1999)

“If machines produce everything we need, the outcome will depend on how things are distributed. Everyone can enjoy a life of luxurious leisure if the machine-produced wealth is shared, or most people can end up miserably poor if the machine-owners successfully lobby against wealth redistribution. So far, the trend seems to be toward the second option, with technology driving ever-increasing inequality.”

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Stephen Hawking

"Science AMA Series: Stephen Hawking AMA Answers!", reddit.com (8 October 2015) https://www.reddit.com/r/science/comments/3nyn5i/science_ama_series_stephen_hawking_ama_answers/cvsdmkv/; also quoted in "Stephen Hawking Says We Should Really Be Scared Of Capitalism, Not Robots" Huffington Post (8 October 2015) http://www.huffingtonpost.com/entry/stephen-hawking-capitalism-robots_us_5616c20ce4b0dbb8000d9f15