---
title: "78 Donald Knuth Quotes - Famous Mathematician (The art of computer programming)"
description: "Donald Knuth quotes on humility, reasoning errors, and the Euclidean algorithm."
image: "https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b008/author-donald-knuth-30007.jpg"
---

![Portrait of Donald Knuth](https://sms4smile.com/quotes/wp-content/uploads/sms4s/authors/processed/b008/author-donald-knuth-30007.jpg)

# Donald Knuth

(1938)   Mathematician   United States

 **78** quotes in **431** categories

I’ll never know everything, says Donald Knuth, reminding us that humility is part of learning. He points out that faulty reasoning often hides behind the phrase “of course,” and he marvels at the Euclidean algorithm’s long‑lasting place in computing. He also admits that software is hard and that early bugs teach valuable lessons.

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Donald Knuth is a mathematician from the United States, best known for *The art of computer programming*.

## Quick Facts About Donald Knuth

Born January 10, 1938

Nationality United States

Profession Mathematician

Notable works The art of computer programming

Known for TeX, The Art of Computer Programming, literate programming, Computer Modern, WEB

## About Donald Knuth

Donald Ervin Knuth is an American computer scientist and mathematician. He is a professor emeritus at Stanford University. He is the 1974 recipient of the ACM Turing Award, informally considered the Nobel Prize of computer science. Knuth has been called the "father of the analysis of algorithms".

## Awards & Honors

honorary doctor of Harvard University honorary doctorate of the University of Glasgow Fellow of the American Mathematical Society honorary doctor of ETH Zürich honorary doctor of the University of Paris-Est-Marne-la-Vallée honorary doctorate of the Masaryk University honorary doctor of the University of Tübingen honorary doctor of the University of Antwerp

Show 24 more awards honorary doctorate from University of Bordeaux-I honorary doctorate from University of Paris-XI Turing Award John von Neumann Prize IEEE John von Neumann Medal National Medal of Science Leroy P. Steele Prize ACM Software System Award Paul R. Halmos - Lester R. Ford Awards Guggenheim Fellowship Faraday Medal Josiah Willard Gibbs Lectureship Grace Murray Hopper Award Harvey Prize W. Wallace McDowell Award Franklin Medal Fellow of the British Computer Society BBVA Foundation Frontiers of Knowledge Award Kyoto Prize in Advanced Technology Turing Talk Foreign Member of the Royal Society ACM Fellow Computer History Museum Fellow Fellow of the Society for Industrial and Applied Mathematics

##  Quotes by Donald Knuth

> [Programming is legitimate and necessary academic endeavour.](https://sms4smile.com/quotes/donald-knuth/programming-is-legitimate-and-necessary-academic-endeavour/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Academic](https://sms4smile.com/quotes/about/academic/)

[Image](https://sms4smile.com/quotes/i/ee5/donald-knuth-8762_academic_programming-is-legitimate-and-necessary_2732585.jpg)

> [The best theory is inspired by practice.](https://sms4smile.com/quotes/donald-knuth/the-best-theory-is-inspired-by-practice/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Inspiration](https://sms4smile.com/quotes/about/inspiration/)

[Image](https://sms4smile.com/quotes/i/13c/donald-knuth-8762_inspiration_the-best-theory-is-inspired-by-practice_2450651.jpg)

> [The best practice is inspired by theory.](https://sms4smile.com/quotes/donald-knuth/the-best-practice-is-inspired-by-theory/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Best practices](https://sms4smile.com/quotes/about/best-practices/)

[Image](https://sms4smile.com/quotes/i/4fc/donald-knuth-8762_best-practices_the-best-practice-is-inspired-by-theory_2283149.jpg)

> [I'm obsessively detail-oriented.](https://sms4smile.com/quotes/donald-knuth/i-m-obsessively-detail-oriented/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/805/donald-knuth-8762_details_i-m-obsessively-detail-oriented-2142570_2142570.jpg)

> [If you optimize everything, you will always be unhappy.](https://sms4smile.com/quotes/donald-knuth/if-you-optimize-everything-you-will-always-be-unhappy/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Optimize](https://sms4smile.com/quotes/about/optimize/)

[Image](https://sms4smile.com/quotes/i/5c7/donald-knuth-8762_optimize_if-you-optimize-everything-you-will-alwa_269874.jpg)

> [It is much more rewarding to do more with less.](https://sms4smile.com/quotes/donald-knuth/it-is-much-more-rewarding-to-do-more-with-less/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Funny](https://sms4smile.com/quotes/about/funny/)

[Image](https://sms4smile.com/quotes/i/308/donald-knuth-8762_funny_it-is-much-more-rewarding-to-do-more-wit_2155706.jpg)

> [ How can you own \[...\] numbers? Numbers belong to the world. ](https://sms4smile.com/quotes/donald-knuth/how-can-you-own-numbers-numbers-belong-to-the-world/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/ebe/donald-knuth-8762_belong_how-can-you-own-numbers-numbers-belong-t_822239.jpg)

> [A list is only as strong as its weakest link.](https://sms4smile.com/quotes/donald-knuth/a-list-is-only-as-strong-as-its-weakest-link/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/e21/donald-knuth-8762_links_a-list-is-only-as-strong-as-its-weakest_1326836.jpg)

> [I define UNIX as 30 definitions of regular expressions living under one roof.](https://sms4smile.com/quotes/donald-knuth/i-define-unix-as-30-definitions-of-regular-expressions-living-under/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/2af/donald-knuth-8762_definitions_i-define-unix-as-30-definitions-of-regul_2749187.jpg)

> [The most important thing in the kitchen is the waste paper basket and it needs to be centrally located.](https://sms4smile.com/quotes/donald-knuth/the-most-important-thing-in-the-kitchen-is-the-waste-paper-basket-and/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/d4d/donald-knuth-8762_baskets_the-most-important-thing-in-the-kitchen_1713654.jpg)

> [The sun comes up just about as often as it goes down, in the long run, but this doesn't make its motion…](https://sms4smile.com/quotes/donald-knuth/the-sun-comes-up-just-about-as-often-as-it-goes-down-in-the-long-run/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/cd0/donald-knuth-8762_come-up_the-sun-comes-up-just-about-as-often-as_705869.jpg)

> [Beware of bugs in the above code; I have only proved it correct, not tried it.](https://sms4smile.com/quotes/donald-knuth/beware-of-bugs-in-the-above-code-i-have-only-proved-it-correct-not/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Bugs](https://sms4smile.com/quotes/about/bugs/)

[Image](https://sms4smile.com/quotes/i/76f/donald-knuth-8762_bugs_beware-of-bugs-in-the-above-code-i-have_1838931.jpg)

> [“Nearly every example of faulty reasoning that has been published is accompanied by the phrase "of course" or its equivalent.”](https://sms4smile.com/quotes/donald-knuth/nearly-every-example-of-faulty-reasoning-that-has-been-published-is/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Reasoning](https://sms4smile.com/quotes/about/reasoning/)

[Image](https://sms4smile.com/quotes/i/57c/donald-knuth-8762_reasoning_nearly-every-example-of-faulty-reasoning_44727.jpg)

> [Programs are meant to be read by humans and only incidentally for computers to execute.](https://sms4smile.com/quotes/donald-knuth/programs-are-meant-to-be-read-by-humans-and-only-incidentally-for/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Computer](https://sms4smile.com/quotes/about/computer/)

[Image](https://sms4smile.com/quotes/i/757/donald-knuth-8762_computer_programs-are-meant-to-be-read-by-humans_1455970.jpg)

> [Everyday life is like programming, I guess. If you love something you can put beauty into it.](https://sms4smile.com/quotes/donald-knuth/everyday-life-is-like-programming-i-guess-if-you-love-something-you/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Beauty](https://sms4smile.com/quotes/about/beauty/)

[Image](https://sms4smile.com/quotes/i/547/donald-knuth-8762_beauty_everyday-life-is-like-programming-i-gues_2597772.jpg)

> [Computers are good at following instructions, but not at reading your mind.](https://sms4smile.com/quotes/donald-knuth/computers-are-good-at-following-instructions-but-not-at-reading-your/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Computer](https://sms4smile.com/quotes/about/computer/)

[Image](https://sms4smile.com/quotes/i/1db/donald-knuth-8762_computer_computers-are-good-at-following-instruct_299686.jpg)

> [AI has by now succeeded in doing essentially everything that requires 'thinking' but has failed to do most of what people and…](https://sms4smile.com/quotes/donald-knuth/ai-has-by-now-succeeded-in-doing-essentially-everything-that-requires/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Animal](https://sms4smile.com/quotes/about/animal/)

[Image](https://sms4smile.com/quotes/i/90d/donald-knuth-8762_animal_ai-has-by-now-succeeded-in-doing-essenti_567023.jpg)

> [I am worried that algorithms are getting too prominent in the world. It started out that computer scientists were worried nobody was…](https://sms4smile.com/quotes/donald-knuth/i-am-worried-that-algorithms-are-getting-too-prominent-in-the-world/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Algorithms](https://sms4smile.com/quotes/about/algorithms/)

[Image](https://sms4smile.com/quotes/i/790/donald-knuth-8762_i-am_i-am-worried-that-algorithms-are-getting_2051531.jpg)

> [People think that computer science is the art of geniuses but the actual reality is the opposite, just many people doing things…](https://sms4smile.com/quotes/donald-knuth/people-think-that-computer-science-is-the-art-of-geniuses-but-the/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Art](https://sms4smile.com/quotes/about/art/)

[Image](https://sms4smile.com/quotes/i/a6b/donald-knuth-8762_art_people-think-that-computer-science-is-th_1980458.jpg)

> [These machines have no common sense; they have not yet learned to "think," and they do exactly as they are told, no…](https://sms4smile.com/quotes/donald-knuth/these-machines-have-no-common-sense-they-have-not-yet-learned-to/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/523/donald-knuth-8762_common_these-machines-have-no-common-sense-they_3024975.jpg)

> [The important thing, once you have enough to eat and a nice house, is what you can do for others, what you…](https://sms4smile.com/quotes/donald-knuth/the-important-thing-once-you-have-enough-to-eat-and-a-nice-house-is/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Business](https://sms4smile.com/quotes/about/business/)

[Image](https://sms4smile.com/quotes/i/71d/donald-knuth-8762_business_the-important-thing-once-you-have-enough_1429283.jpg)

> [By understanding a machine-oriented language, the programmer will tend to use a much more efficient method; it is much closer to reality.](https://sms4smile.com/quotes/donald-knuth/by-understanding-a-machine-oriented-language-the-programmer-will-tend/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/b7d/donald-knuth-8762_efficient_by-understanding-a-machine-oriented-lang_1941311.jpg)

> [I can't be as confident about computer science as I can about biology. Biology easily has 500 years of exciting problems to…](https://sms4smile.com/quotes/donald-knuth/i-can-t-be-as-confident-about-computer-science-as-i-can-about-biology/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Biology](https://sms4smile.com/quotes/about/biology/)

[Image](https://sms4smile.com/quotes/i/817/donald-knuth-8762_biology_i-can-t-be-as-confident-about-computer-s_1859932.jpg)

> [In fact what I would like to see is thousands of computer scientists let loose to do whatever they want. That's what…](https://sms4smile.com/quotes/donald-knuth/in-fact-what-i-would-like-to-see-is-thousands-of-computer-scientists/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/c47/donald-knuth-8762_computer_in-fact-what-i-would-like-to-see-is-thou_1106540.jpg)

> [The book Dynamic Programming by Richard Bellman is an important, pioneering work in which a group of problems is collected together at…](https://sms4smile.com/quotes/donald-knuth/the-book-dynamic-programming-by-richard-bellman-is-an-important/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/f67/donald-knuth-8762_appearing_the-book-dynamic-programming-by-richard_2555321.jpg)

> [When you write a program, think of it primarily as a work of literature. You're trying to write something that human beings…](https://sms4smile.com/quotes/donald-knuth/when-you-write-a-program-think-of-it-primarily-as-a-work-of/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/077/donald-knuth-8762_be-you_when-you-write-a-program-think-of-it-pri_1550531.jpg)

> [Computer programming is an art, because it applies accumulated knowledge to the world, because it requires skill and ingenuity, and especially because…](https://sms4smile.com/quotes/donald-knuth/computer-programming-is-an-art-because-it-applies-accumulated/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Art](https://sms4smile.com/quotes/about/art/)

[Image](https://sms4smile.com/quotes/i/321/donald-knuth-8762_art_computer-programming-is-an-art-because-i_2816449.jpg)

> [When certain concepts of TeX are introduced informally, general rules will be stated; afterwards you will find that the rules aren't strictly…](https://sms4smile.com/quotes/donald-knuth/when-certain-concepts-of-tex-are-introduced-informally-general-rules/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/5bc/donald-knuth-8762_certain_when-certain-concepts-of-tex-are-introdu_112209.jpg)

> [Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts…](https://sms4smile.com/quotes/donald-knuth/programmers-waste-enormous-amounts-of-time-thinking-about-or-worrying/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/ff2/donald-knuth-8762_amount_programmers-waste-enormous-amounts-of-ti_573136.jpg)

> [...methods are more important than facts. The educational value of a problem given to a student depends mostly on how often the…](https://sms4smile.com/quotes/donald-knuth/methods-are-more-important-than-facts-the-educational-value-of-a/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/917/donald-knuth-8762_answers_methods-are-more-important-than-facts-th_2303012.jpg)

> [... the designer of a new system must not only be the implementor and the first large-scale user; the designer should also…](https://sms4smile.com/quotes/donald-knuth/the-designer-of-a-new-system-must-not-only-be-the-implementor-and-the/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/8e8/donald-knuth-8762_activity_the-designer-of-a-new-system-must-not-on_633794.jpg)

> [My first program taught me a lot about the errors that I was going to be making in the future, and also…](https://sms4smile.com/quotes/donald-knuth/my-first-program-taught-me-a-lot-about-the-errors-that-i-was-going-to/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Computing](https://sms4smile.com/quotes/about/computing/)

[Image](https://sms4smile.com/quotes/i/327/donald-knuth-8762_computing_my-first-program-taught-me-a-lot-about-t_176495.jpg)

> [...One of the most important lessons, perhaps, is the fact that SOFTWARE IS HARD. From now on I shall have significantly greater…](https://sms4smile.com/quotes/donald-knuth/one-of-the-most-important-lessons-perhaps-is-the-fact-that-software/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Accuracy](https://sms4smile.com/quotes/about/accuracy/)

[Image](https://sms4smile.com/quotes/i/371/donald-knuth-8762_accuracy_one-of-the-most-important-lessons-perhap_379785.jpg)

> [An algorithm must be seen to be believed.](https://sms4smile.com/quotes/donald-knuth/an-algorithm-must-be-seen-to-be-believed/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Algorithm](https://sms4smile.com/quotes/about/algorithm/)

[Image](https://sms4smile.com/quotes/i/576/donald-knuth-8762_algorithms_an-algorithm-must-be-seen-to-be-believed_1981061.jpg)

> [Trees sprout up just about everywhere in computer science.](https://sms4smile.com/quotes/donald-knuth/trees-sprout-up-just-about-everywhere-in-computer-science/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Computer](https://sms4smile.com/quotes/about/computer/)

[Image](https://sms4smile.com/quotes/i/a94/donald-knuth-8762_computer_trees-sprout-up-just-about-everywhere-in_787983.jpg)

> [There's ways to amuse yourself while doing things and thats how I look at efficency.](https://sms4smile.com/quotes/donald-knuth/there-s-ways-to-amuse-yourself-while-doing-things-and-thats-how-i/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/206/donald-knuth-8762_doing-things_there-s-ways-to-amuse-yourself-while-doi_1052642.jpg)

> [It would be nice if we could design a virtual reality in Hyperbolic Space, and meet each other there.](https://sms4smile.com/quotes/donald-knuth/it-would-be-nice-if-we-could-design-a-virtual-reality-in-hyperbolic/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Being nice](https://sms4smile.com/quotes/about/being-nice/)

[Image](https://sms4smile.com/quotes/i/f25/donald-knuth-8762_being-nice_it-would-be-nice-if-we-could-design-a-vi_218937.jpg)

> [I can’t go to a restaurant and order food because I keep looking at the fonts on the menu.](https://sms4smile.com/quotes/donald-knuth/i-can-t-go-to-a-restaurant-and-order-food-because-i-keep-looking-at/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Image](https://sms4smile.com/quotes/i/6ba/donald-knuth-8762_fonts_i-can-t-go-to-a-restaurant-and-order-foo_1448773.jpg)

> [God is a challenge because there is no proof of his existence and therefore the search must continue.](https://sms4smile.com/quotes/donald-knuth/god-is-a-challenge-because-there-is-no-proof-of-his-existence-and/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Challenge](https://sms4smile.com/quotes/about/challenge/)

[Image](https://sms4smile.com/quotes/i/35a/donald-knuth-8762_challenge_god-is-a-challenge-because-there-is-no-p_3128066.jpg)

> [Programming is the art of telling another human being what one wants the computer to do.](https://sms4smile.com/quotes/donald-knuth/programming-is-the-art-of-telling-another-human-being-what-one-wants/)

[Donald Knuth](https://sms4smile.com/quotes/author/donald-knuth/)

[Art](https://sms4smile.com/quotes/about/art/)

[Image](https://sms4smile.com/quotes/i/3f5/donald-knuth-8762_art_programming-is-the-art-of-telling-anothe_2878981.jpg)

## Donald Knuth by topic

[Programming (31)](https://sms4smile.com/quotes/about/programming/donald-knuth/) [Technology (28)](https://sms4smile.com/quotes/about/technology/donald-knuth/) [Computers (21)](https://sms4smile.com/quotes/about/computers/donald-knuth/) [Computer (21)](https://sms4smile.com/quotes/about/computer/donald-knuth/) [Science (15)](https://sms4smile.com/quotes/about/science/donald-knuth/) [People (10)](https://sms4smile.com/quotes/about/people/donald-knuth/)

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                        "text": "People think that computer science is the art of geniuses but the actual reality is the opposite, just many people doing things that build on each other, like a wall of mini stones.",
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                        "text": "These machines have no common sense; they have not yet learned to \"think,\" and they do exactly as they are told, no more and no less. This fact is the hardest concept to grasp when one first tries to use a computer.",
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                        "text": "By understanding a machine-oriented language, the programmer will tend to use a much more efficient method; it is much closer to reality.",
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                        "text": "I can't be as confident about computer science as I can about biology. Biology easily has 500 years of exciting problems to work on. It's at that level.",
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                        "text": "The book Dynamic Programming by Richard Bellman is an important, pioneering work in which a group of problems is collected together at the end of some chapters under the heading \"Exercises and Research Problems,\" with extremely trivial questions appearing in the midst of deep, unsolved problems. It is rumored that someone once asked Dr. Bellman how to tell the exercises apart from the research problems, and he replied: \"If you can solve it, it is an exercise; otherwise it's a research problem.\"",
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                        "text": "When you write a program, think of it primarily as a work of literature. You're trying to write something that human beings are going to read. Don't think of it primarily as something a computer is going to follow. The more effective you are at making your program readable, the more effective it's going to be: You'll understand it today, you'll understand it next week, and your successors who are going to maintain and modify it will understand it.",
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                        "text": "Computer programming is an art, because it applies accumulated knowledge to the world, because it requires skill and ingenuity, and especially because it produces objects of beauty. A programmer who subconsciously views himself as an artist will enjoy what he does and will do it better.",
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                        "text": "When certain concepts of TeX are introduced informally, general rules will be stated; afterwards you will find that the rules aren't strictly true. In general, the later chapters contain more reliable information than the earlier ones do. The author feels that this technique of deliberate lying will actually make it easier for you to learn the ideas. Once you understand a simple but false rule, it will not be hard to supplement that rule with its exceptions.",
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                        "text": "Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered. We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil. Yet we should not pass up our opportunities in that critical 3%.",
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                        "text": "...methods are more important than facts. The educational value of a problem given to a student depends mostly on how often the thought processes that are invoked to solve it will be helpful in later situations. It has little to do with how useful the answer to the problem may be. On the other hand, a good problem must also motivate the students; they should be interested in seeing the answer. Since students differ so greatly, I cannot expect everyone to like the problems that please me.",
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                        "text": "... the designer of a new system must not only be the implementor and the first large-scale user; the designer should also write the first user manual. ... If I had not participated fully in all these activities, literally hundreds of improvements would never have been made, because I would never have thought of them or perceived why they were important.",
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                        "text": "My first program taught me a lot about the errors that I was going to be making in the future, and also about how to find errors. That's sort of the story of my life, making errors and trying to recover from them. I try to get things correct. I probably obsess about not making too many mistakes.",
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                        "text": "...One of the most important lessons, perhaps, is the fact that SOFTWARE IS HARD. From now on I shall have significantly greater respect for every successful software tool that I encounter. During the past decade I was surprised to learn that the writing of programs for TeX and Metafont proved to be much more difficult than all the other things I had done (like proving theorems or writing books). The creation of good software demand a significiantly higher standard of accuracy than those other things do, and it requires a longer attention span than other intellectual tasks.",
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                        "text": "An algorithm must be seen to be believed.",
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                        "text": "Trees sprout up just about everywhere in computer science.",
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