First Quote Added
April 10, 2026
Latest Quote Added
"The "computable" numbers may be described briefly as the real numbers whose expressions as a decimal are calculable by finite means. ...According to my definition, a number is computable if its decimal can be written down by a machine. ...I show that certain large classes of numbers are computable. They include, for instance, the real parts of all s, the real parts of the zeros of the Bessel functions, the numbers π, e, etc. The computable numbers do not, however, include all definable numbers. ...[C]onclusions are reached which are superficially similar to those of Gödel. ...[I]t is shown ...that the Hilbertian can have no solution. In a recent paper ... reaches similar conclusions..."
"Let us now assume, for the sake of argument, that these machines are a genuine possibility, and look at the consequences of constructing them. To do so would of course meet with great opposition, unless we have advanced greatly in religious toleration from the days of Galileo. There would be great opposition from the intellectuals who were afraid of being put out of a job. It is probable though that the intellectuals would be mistaken about this. There would be plenty to do, trying to understand what the machines were trying to say, i.e. in trying to keep one’s intelligence up to the standard set by the machines, for it seems probable that once the machine thinking method had started, it would not take long to outstrip our feeble powers. There would be no question of the machines dying, and they would be able to converse with each other to sharpen their wits. At some stage therefore we should have to expect the machines to take control, in the way that is mentioned in Samuel Butler’s “Erewhon”."
"The Exclusion Principle is laid down purely for the benefit of the electrons themselves, who might be corrupted (and become dragons or demons) if allowed to associate too freely."
"Science is a differential equation. Religion is a boundary condition."
"This is only a foretaste of what is to come, and only the shadow of what is going to be. We have to have some experience with the machine before we really know its capabilities. It may take years before we settle down to the new possibilities, but I do not see why it should not enter any one of the fields normally covered by the human intellect, and eventually compete on equal terms."
"A man provided with paper, pencil, and rubber, and subject to strict discipline, is in effect a universal machine."
"There is a remarkably close parallel between the problems of the physicist and those of the cryptographer. The system on which a message is enciphered corresponds to the laws of the universe, the intercepted messages to the evidence available, the keys for a day or a message to important constants which have to be determined. The correspondence is very close, but the subject matter of cryptography is very easily dealt with by discrete machinery, physics not so easily."
"Mathematical reasoning may be regarded rather schematically as the exercise of a combination of two facilities, which we may call intuition and ingenuity. The activity of the intuition consists in making spontaneous judgements which are not the result of conscious trains of reasoning... The exercise of ingenuity in mathematics consists in aiding the intuition through suitable arrangements of propositions, and perhaps geometrical figures or drawings."
"He was particularly fond of little programming tricks (some people would say that he was too fond of them to be a "good" programmer) and would chuckle with boyish good humor at any little tricks I may have used."
"Turing had a strong predeliction for working things out from first principles, usually in the first instance without consulting any previous work on the subject, and no doubt it was this habit which gave his work that characteristically original flavor. I was reminded of a remark which Beethoven is reputed to have made when he was asked if he had heard a certain work of Mozart which was attracting much attention. He replied that he had not, and added "neither shall I do so, lest I forfeit some of my own originality.""
"Although a mathematician, Turing took quite an interest in the engineering side of computer design. There was some discussion in 1947 as to whether a cheaper substance than mercury could not be found for use as an ultrasonic delay medium. Turing's contribution to this discussion was to advocate the use of gin, which he said contained alcohol and water in just the right proportions to give a zero temperature coefficient of propagation velocity at room temperature."
"He wondered what one might ask in a structured conversation to decide if one's interlocutor was a human being or a computer. ...but the ultimate Turing test might be to pose the question "How would a guilt-stricken homosexual commit suicide?" Would a computer ever conceive of eating an apple laced with cyanide?"
"His high-pitched voice already stood out above the general murmur of well-behaved junior executives grooming themselves for promotion within the Bell corporation. Then he was suddenly heard to say: "No, I'm not interested in developing a powerful brain. All I'm after is just a mediocre brain, something like the President of the American Telephone and Telegraph Company.""
"Instruction tables will have to be made up by mathematicians with computing experience and perhaps a certain puzzle-solving ability. There need be no real danger of it ever becoming a drudge, for any processes that are quite mechanical may be turned over to the machine itself."
"I’m not gay, but I don’t think you have to be gay to have a gay hero. Growing up, Alan Turing was certainly mine. … I’m also not the greatest mathematician of my generation. We have lots of biographical differences, but nonetheless I always identified with him so much."
"Here’s the thing. Alan Turing never got to stand on a stage like this and look out at all of these disconcertingly attractive faces. I do. And that’s the most unfair thing I’ve ever heard. So in this brief time here, what I wanted to do was say this: When I was 16-years-old, I tried to kill myself because I felt weird and I felt different, and I felt like I did not belong. And now I’m standing here — and so I would like this moment to be for this kid out there who feels like she’s weird or she’s different or she doesn’t fit in anywhere: Yes, you do. I promise you do. Stay weird, stay different — and then, when it’s your turn, and you are standing on this stage, please pass the same message to the next person who comes along."
"From a very young age, I knew about the legend of Alan Turing – among awkward, nerdy teenagers, he is a patron saint. He never fit in, but accomplished these wonderful things, as part of a secret queer history of computer science. And so I always dreamt of writing something about him, and I thought that there had never been a proper narrative treatment of his life, that he deserved. I by chance met the producers of the film at a party, and one of them told me they had optioned a biography. When I asked who it was, they said, ‘it’s a mathematician that you’ve never heard of.’ When they told me it was Alan Turing, I almost tackled them, and I told them I’d do anything to write this film, I’d write it for free. It was all about luck and passion."
"Actually, with one alleged exception, the links of King’s dons with intelligence were with the British rather than the Soviet secret services. Kingsmen, headed by the small, roly-poly later professor of ancient history, F. E. Adcock, had set up the British codebreaking establishment in the First World War, and at least seventeen King’s dons were recruited by Adcock for the much more famous establishment at Bletchley during the Second World War, including probably the only genius at King’s in my undergraduate years, the mathematical logician Alan Turing, whom I recall as a clumsy-looking, pale-faced young fellow given to what would today be called jogging."
"And if the physicists who understood its potential had not told their generals and politicians, these would certainly have remained in ignorance, unless they were themselves postgraduate physicists, which was very unlikely. Again, Alan Turing's celebrated paper of 1935, which was to provide the foundation of modern computer theory, was originally written as a speculative exploration for mathematical logicians. The war gave him and others the occasion to translate theory into the beginnings of practice for the purpose of code-breaking, but when it appeared nobody except a handful of mathematicians even read, let alone took notice of Turing's paper. Even in his own college this clumsy-looking pale-faced genius, then a junior fellow with a taste for jogging, who posthumously became a sort of icon among homosexuals, was not a figure of any prominence; at least I do not remember him as such."
"Beyond any doubt, the most important thing that has happened in cognitive science was Turing’s invention of the notion of mechanical rationality."
"I’d keep hearing: 'Oh, Alan Turing? Wasn’t he something to do with Bletchley Park? Didn’t he create the Apple logo? Didn’t he bite an apple?' But not many people know the whole story, that he invented the computer, broke the Enigma code, was prosecuted for being a homosexual and underwent a year of oestrogen injections before dying in 1954. The irony and sickness of it was extraordinary! He wasn’t shouting from the rooftops or trying to start a cause, he was just a man who was gay. He’s such a quiet hero."
"I'm convinced there's a small room in the attic of the Foreign Office where future diplomats are taught to stammer."
"Peter's most outstanding achievement was to be Peter Ustinov … and he was an all-round wonderful person. I'm very glad to have known him, I shall miss him greatly."
"He was one of the great story tellers of modern times. The biggest shame is that we have so few people left these days who really tell stories."
"Jack of all trades, master of none — but what a jack! … In the end he was a disappointed man … He wanted to be a great playwright or a great author. He never quite made that."
"He would always see the bright side of something, even something that would be very annoying to him or to all of us around him. He would get over it and he would always find that there was something positive to be gained from it. He was a giver, throughout everything, and a wonderful warm person."
"The day had to come when he'd be gone. Thank God it was a long time coming. But he's a big thing to do without."
"I think he'd just get bored doing one thing. He would go from one thing to another I think because to him it was all one. That's what I loved about him. He was a very lovable man. I hardly knew him, I only met him two or three times, but each time was ingrained in my memory like being like some superb intellectual circus."
"I quite like talking myself, but when Peter was in the room there wasn't much point, you just had to listen. He was unimaginably, overwhelmingly gifted. You had to imagine a cross between Dr Johnson, Isaiah Berlin, Peter Sellers and don't forget Charlie Chaplin — because Peter was a great mime too. … He was inexhaustible. It was like talking to Europe, talking to history."
"He was a man for all seasons, perhaps the true renaissance man."
"Sunshine Sally and Peter Ustinov don't like the scene anyhow. I dropped acid on a Saturday night just to see what the fuss was about."
"It was as if all the world's wit were rolled into one portly fellow. … He spoke six languages, and a few others of his own comic invention. With gifts too wide-ranging to be contained in one art form, he wrote hit plays (Romanoff and Juliet) and books of nonfiction and short stories. … His spirit was essentially impish (as on a comedy album for which he provided all the voices and sound effects); his greatest role was Peter Ustinov, inexhaustible raconteur. The title of his 1977 autobiography summed up the world's opinion of this engaging, capacious talent: Dear Me."
"Then he lifted his body up To throw himself to a watery grave "Peter," I yelled "What about Billy Budd The innocent no one could save?""
"I was walking barefoot on St. Paul's bridge When I saw a man talking to God He was round and handsome Anachronistically A little odd I overheard his conversation He said, "I can't live in a world devoid of love." And the voice, the voice was so familiar It was the voice of Peter Ustinov "Peter," I whispered from the shadows "We've all been damaged by the 20th century A man like you can talk to God But can you spare a word for me? For I have loved you since the time I saw you in The Mouse that Roared." "That was Peter Sellers, my dear. Go away," he implored."
"Sir Peter had a magical way with children and an inimitable way of making their problems matter to people all over the world. He was one of UNICEF’s most effective and beloved partners, a man who exemplified the idea that one person can make a world of difference. … There are few parts of the globe where Sir Peter did not travel to meet with and advocate for children, and few communities that were not made better by his attention."
"He was a superb raconteur — never vicious, never cruel."
"He had a great sense of the good in people. He enjoyed the peculiarities that were part of humanity. … Filming can be desperately boring and he was always telling fantastic stories and being tremendously entertaining."
"The point of living, and of being an optimist, is to be foolish enough to believe the best is yet to come."
"Critics search for ages for the wrong word, which, to give them credit, they eventually find."
"If the world should blow itself up, the last audible voice would be that of an expert saying it can't be done."
"Love is an act of endless forgiveness, a tender look which becomes a habit."
"To refuse awards is another way of accepting them with more noise than is normal."
"It is our responsibilities, not ourselves, that we should take seriously."
"I have four children which is not bad considering I'm not a Catholic."
"Her virtue was that she said what she thought, her vice that what she thought didn't amount to much."
"Basically I'm a very serious person, but I think the form it takes with me is comedy. I see the amusing side of all potentially pompous situations."
"The social sciences were for all those who had not yet decided what to do with their lives, and for all those whose premature frustrations led them into the sterile alleys of confrontation."
"We have fought two wars to end war. In 1976, the nations of this world set aside the same amount of money for its starving children as the lavished on armaments every two hours. Can any right-minded man afford to be a pessimist? That was a luxury for easier days."
"I am an optimist, unrepentant and militant. After all, in order not to be a fool, an optimist must know what a sad place the world can be. It is only the pessimist who finds this out anew every day."
"Life was cheap in the Middle Ages. It has become cheaper since. It is only in specific battles for specific lives that our culture is put to the test, and with it our humanity."