The use of COBOL cripples the mind; its teaching should, therefore, be regarded as a criminal offense.

I mentioned the non-competitive spirit explicitly, because these days, excellence is a fashionable concept. But excellence is a competitive notion, and that is not what we are heading for: we are heading for perfection.

Simplicity is prerequisite for reliability.

About the use of language: it is impossible to sharpen a pencil with a blunt axe. It is equally vain to try to do it with ten blunt axes instead.

The ability of discerning high quality unavoidably implies the ability of identifying shortcomings.

The question of whether a computer can think is no more interesting than the question of whether a submarine can swim.

Program testing can be used to show the presence of bugs, but never to show their absence!

The lurking suspicion that something could be simplified is the world's richest source of rewarding challenges.

Elegance is not a dispensable luxury but a factor that decides between success and failure.

There should be no such thing as boring mathematics.

Mathematicians are like managers - they want improvement without change.

Programming is one of the most difficult branches of applied mathematics; the poorer mathematicians had better remain pure mathematicians.

Don't compete with me: firstly, I have more experience, and secondly, I have chosen the weapons.

Teaching to unsuspecting youngsters the effective use of formal methods is one of the joys of life because it is so extremely rewarding.

Why has elegance found so little following? That is the reality of it. Elegance has the disadvantage, if that's what it is, that hard work is needed to achieve it and a good education to appreciate it.

Computer science is no more about computers than astronomy is about telescopes.

Perfecting oneself is as much unlearning as it is learning.

The students that, like the wild animal being prepared for its tricks in the circus called "life", expects only training as sketched above, will be severely disappointed: by his standards he will learn next to nothing.

If 10 years from now, when you are doing something quick and dirty, you suddenly visualize that I am looking over your shoulders and say to yourself: 'Dijkstra would not have liked this', well that would be enough immortality for me.

The traditional mathematician recognizes and appreciates mathematical elegance when he sees it. I propose to go one step further, and to consider elegance an essential ingredient of mathematics: if it is clumsy, it is not mathematics.

APL is a mistake, carried through to perfection. It is the language of the future for the programming techniques of the past: it creates a new generation of coding bums.

The use of COBOL cripples the mind; its teaching should, therefore, be regarded as a criminal offense.

Object-oriented programming is an exceptionally bad idea which could only have originated in California.

Aim for brevity while avoiding jargon.

It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration.

The competent programmer is fully aware of the limited size of his own skull. He therefore approaches his task with full humility, and avoids clever tricks like the plague.

Many mathematicians derive part of their self-esteem by feeling themselves the proud heirs of a long tradition of rational thinking; I am afraid they idealize their cultural ancestors.

The students that, like the wild animal being prepared for its tricks in the circus called 'life', expects only training as sketched above, will be severely disappointed: by his standards he will learn next to nothing.

Mathematicians are like managers they want improvement without change.

If debugging is the process of removing software bugs, then programming must be the process of putting them in.

If we wish to count lines of code, we should not regard them as lines produced but as lines spent.

Cancer can take away all of my physical abilities. It cannot touch my mind, it cannot touch my heart, and it cannot touch my soul.

A man must be strong in that profession, he must have vigor of body and mind, yet I am all out of breath if I walk up a hill; I have not the heart to crush even a fly.

There are those, I know, who will reply that the liberation of humanity, the freedom of man and mind, is nothing but a dream. They are right. It is. It is the American Dream.

The experience of life consists of the experience which the spirit has of itself in matter and as matter, in mind and as mind, in emotion, as emotion, etc.

Singularity shows something wrong in the mind.

Remember above all that mental stability comes by examining the contents of the mind, not by avoidence.

I think we will have a boy baby and he will be born on the 20th of August. Everyone else has a girl baby and at times I don't believe I should mind having a little Phyllis Dawn but Dearest wants a boy and I do.

Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment.

But if anyone supposes that there was no commercial fraud in the Middle Ages, let him study the commercial legislation of England for that period, and his mind will be satisfied, if he has a mind to be satisfied and not only a fancy to run away with him.

The mind moves in the direction of our currently dominant thoughts.

I love the male body, it's better designed than the male mind.

Disney had such a hold on the mind of America-they were Adolf Hitler. The whole country thought Disney was some sort of god and that animation was some sort of pure thing for children.

One of the most difficult things to contend with in a hospital is that assumption on the part of the staff that because you have lost your gall bladder you have also lost your mind.

I did know that the book would end with a mind-boggling trial, but I didn't know exactly how it would turn out. I like a little suspense when I am writing, too.

Many ideas grow better when transplanted into another mind than in the one where they sprung up.

With a firm and steadfast mind one should hold under all conditions, that everywhere the earth is below and the sky above, and to the energetic man, every region is his fatherland.

Periods of wholesome laziness, after days of energetic effort, will wonderfully tone up the mind and body.

Keep your blood clean, your body lean, and your mind sharp.