Quotes from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

“Programs must be written for people to read, and only incidentally for machines to execute.”
― Harold Abelson, quote from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

“Computational processes are abstract beings that inhabit computers. As they evolve, processes manipulate other abstract things called data. The evolution of a process is directed by a pattern of rules called a program. People create programs to direct processes. In effect, we conjure the spirits of the computer with our spells.”
― Harold Abelson, quote from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

“Syntactic sugar causes cancer of the semicolon.”
― Harold Abelson, quote from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

“I think that it's extraordinarily important that we in computer science keep fun in computing. When it started out, it was an awful lot of fun. Of course, the paying customers got shafted every now and then, and after a while we began to take their complaints seriously. We began to feel as if we really were responsible for the successful, error-free perfect use of these machines. I don't think we are. I think we're responsible for stretching them, setting them off in new directions, and keeping fun in the house. I hope the field of computer science never loses its sense of fun. Above all, I hope we don't become missionaries. Don't feel as if you're Bible salesmen. The world has too many of those already. What you know about computing other people will learn. Don't feel as if the key to successful computing is only in your hands. What's in your hands, I think and hope, is intelligence: the ability to see the machine as more than when you were first led up to it, that you can make it more.”
― Harold Abelson, quote from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

“Underlying our approach to this subject is our conviction that "computer science" is not a science and that its significance has little to do with computers. The computer revolution is a revolution in the way we think and in the way we express what we think. The essence of this change is the emergence of what might best be called procedural epistemology—the study of the structure of knowledge from an imperative point of view, as opposed to the more declarative point of view taken by classical mathematical subjects. Mathematics provides a framework for dealing precisely with notions of "what is". Computation provides a framework for dealing precisely with notions of "how to".”
― Harold Abelson, quote from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

“We are about to study the idea of a computational process. Computational processes are abstract beings that inhabit computers. As they evolve, processes manipulate other abstract things called data. The evolution of a process is directed by a pattern of rules called a program. People create programs to direct processes. In effect, we conjure the spirits of the computer with our spells.

A computational process is indeed much like a sorcerer's idea of a spirit. It cannot be seen or touched. It is not composed of matter at all. However, it is very real. It can perform intellectual work. It can answer questions. It can affect the world by disbursing money at a bank or by controlling a robot arm in a factory. The programs we use to conjure processes are like a sorcerer's spells. They are carefully composed from symbolic expressions in arcane and esoteric programming languages that prescribe the tasks we want our processes to perform.

A computational process, in a correctly working computer, executes programs precisely and accurately. Thus, like the sorcerer's apprentice, novice programmers must learn to understand and to anticipate the consequences of their conjuring. Even small errors (usually called bugs or glitches) in programs can have complex and unanticipated consequences.”
― Harold Abelson, quote from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

“It is possible, indeed important, to be able to separate these two notions—to create procedures without naming them, and to give names to procedures that have already been created.”
― Harold Abelson, quote from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

“I hope the field of computer science never loses its sense of fun. ... What you know about computing other people will learn. Don’t feel as if the key to successful computing is only in your hands. What’s in your hands I think and hope is intelligence: the ability to see the machine as more than when you were first led up to it, that you can make it more.”
― Harold Abelson, quote from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

“A powerful programming language is more than just a means for instructing a computer to perform tasks. The language also serves as a framework within which we organize our ideas about processes. Thus, when we describe a language, we should pay particular attention to the means that the language provides for combining simple ideas to form more complex ideas. Every powerful language has three mechanisms for accomplishing this:
- primitive expressions, which represent the simplest entities the language is concerned with,
- means of combination, by which compound elements are built from simpler ones, and
- means of abstraction, by which compound elements can be named and manipulated as units.”
― Harold Abelson, quote from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

“If art interprets our dreams, the computer executes them in the guise of programs!”
― Harold Abelson, quote from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

“Every reader should ask himself periodically ``Toward what end, toward what end?'' -- but do not ask it too often lest you pass up the fun of programming for the constipation of bittersweet philosophy.”
― Harold Abelson, quote from Structure and Interpretation of Computer Programs (MIT Electrical Engineering and Computer Science)

About the author

Popular quotes

“What’s a meet-cute?” Peter’s lying on his side now, his head propped up on his elbow. He looks so adorable I could pinch his cheeks, but I refrain from saying so. His head is big enough as it is. “A meet-cute is when the hero and heroine meet for the very first time, and it’s always in a charming way. It’s how you know they’re going to end up together. The cuter the better.”
― Jenny Han, quote from Always and Forever, Lara Jean

“Сега не съм по-мързелив, отколкото бях преди 40г., но то е защото още преди 40г. бях достигнал крайния предел на мързела. Човек не е в състояние да надхвърли възможностите ти.”
― Mark Twain, quote from Letters from the Earth: Uncensored Writings

“I think of Krishna and his deep blue eyes. It is said, in the hidden scriptures in India, that to focus on the eyes of the Lord is the highest spiritual practice a human being can proform. It's suppose to be equal to the greatest act of charity, which Jesus describes in the Bible as sacrificing one's life to save the life of another.

The Vedas, the Bible, it's true, they overlap a lot.

Maybe gazing into Krishna's eyes...

Pain...Pain...Pain...

Is equal to Christ's sacrifice.

I'm only suffering this pain to protect John. It doesn't matter that he won't see me. I still love him, I will always love him. And in this exquisitely agonizing moment, I realize he refused to see me because he wanted to force me to see him inside. Ah, that's the key! This practice of visualizing that I'm staring into Krishna's blue eyes, I've done it before.

But this is the first time I see him staring back at me!

The Agony comes, and it does not get transformed into bliss.

If anything it is worse than before. Except for one thing.

The pain does not obliterate my sense of "I."

I'm still Sita, the last vampire.”
― Christopher Pike, quote from Thirst No. 3: The Eternal Dawn

“Part of me wanted to walk up to him and hug him from behind, and part of me wanted to hurl a snowball at his perfect face to get some kind of reaction.”
― Julie Kagawa, quote from Winter's Passage

“You wished for me, Athenians; I am here. Do not question me, do not hurt me; I am the wish sprung from your heart, and if you wound me your heart will bleed for it. Your love made me. Do not take it away; for without love I am a temple forsaken by its god, where dark Alastor will enter. It was you, Athenians, who conjured me, a daimon whose food is love. Feed me, then, and I will clothe you with glory, and show you to yourselves in the image of your desire. I am hungry: feed me. It is too late to repent.”
― Mary Renault, quote from The Last of the Wine

Interesting books

About BookQuoters

BookQuoters is a community of passionate readers who enjoy sharing the most meaningful, memorable and interesting quotes from great books. As the world communicates more and more via texts, memes and sound bytes, short but profound quotes from books have become more relevant and important. For some of us a quote becomes a mantra, a goal or a philosophy by which we live. For all of us, quotes are a great way to remember a book and to carry with us the author’s best ideas.

We thoughtfully gather quotes from our favorite books, both classic and current, and choose the ones that are most thought-provoking. Each quote represents a book that is interesting, well written and has potential to enhance the reader’s life. We also accept submissions from our visitors and will select the quotes we feel are most appealing to the BookQuoters community.

Founded in 2023, BookQuoters has quickly become a large and vibrant community of people who share an affinity for books. Books are seen by some as a throwback to a previous world; conversely, gleaning the main ideas of a book via a quote or a quick summary is typical of the Information Age but is a habit disdained by some diehard readers. We feel that we have the best of both worlds at BookQuoters; we read books cover-to-cover but offer you some of the highlights. We hope you’ll join us.