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.

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.

Without feeling abashed by my ignorance, I confess that I am absolutely unable to say. In the absence of an appearance of learning, my answer has at least one merit, that of perfect sincerity.

Words are the children of reason and, therefore, can't explain it. They really can't translate feeling because they're not part of it. That's why it bugs me when people try to analyze jazz as an intellectual theorem. It's not. It's feeling.

The best compliment to a child or a friend is the feeling you give him that he has been set free to make his own inquiries, to come to conclusions that are right for him, whether or not they coincide with your own.

The feeling remains that God is on the journey, too.

I've always wanted to sing, just as I've always known that one day I would have my own niche in the annals of song. It was a feeling I had.

The methods of peace propaganda which aim at establishing peace doctrine by argument and by creating a feeling favorable to peace in general seem to fall short of reaching the springs of human action and of dealing with the causes of the conduct which they seek to modify.

I love making people laugh. It's an addiction and it's probably dysfunctional, but I am addicted to it and there's no greater pleasure for me than sitting in a theater and feeling a lot of people losing control of themselves.

Then came the choreography... the impact of music and choreography tends to really emphasize an overall feeling of what you really want out of the program.

On that road of the informer, it is always night. I cannot ever inform against anyone without feeling something die within me. I inform without pleasure, because it is necessary.

I was as big as I have ever been. I had a personal trainer and was working out. I was feeling good. I was muscular. I had never weighed more than 155 pounds.

Lately, I can't shake the feeling that I've been living a dream for the last 10 years or so; I can't account for most of my 20s, and I have to continually remind myself that certain people are dead now and many of my friends have children.

The key to the mystery of a great artist is that for reasons unknown, he will give away his energies and his life just to make sure that one note follows another... and leaves us with the feeling that something is right in the world.

Collectively, we must do more than simply watch, with resignation and a feeling of powerlessness, reports on the evening news about the latest terrorist atrocity.

But even if I'm left high and dry at the end of this wild journey, just taking it is a great feeling.

For me concrete poetry was a particular way of using language which came out of a particular feeling, and I don't have control over whether this feeling is in me or not.

They must have a feeling of do or die. It is such an overcrowded profession.

You know that day after day of, Oh God what am I going to do with myself feeling? The fear of the emptiness that it implies keeps me going.

But I remember feeling as a producer I felt like the guy who called the caterer and got the band; I had to work the party while everybody else was having a good time.