Edsger W. Dijkstra Quotes & Sayings

Program testing can be used to show the presence of bugs, but never to show their absence! — Edsger W. Dijkstra

Simplicity is prerequisite for reliability. — Edsger W. Dijkstra

Simplicity is a great virtue but it requires hard work to achieve it and education to appreciate it. And to make matters worse: complexity sells better. — Edsger W. Dijkstra

Simplicity and elegance are unpopular because thy require hard work and discipline to achieve and education to be appreciated. — Edsger W. Dijkstra

I mean, 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. — Edsger W. Dijkstra

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

Your obligation is that of active participation. You should not act as knowledge-absorbing sponges, but as whetstones on which we can all sharpen our wits — Edsger W. Dijkstra

It is not only the violin that shapes the violinist, we are all shaped by the tools we train ourselves to use, and in this respect programming languages have a devious influence: they shape our thinking habits. — Edsger W. Dijkstra

By claiming that they can contribute to software engineering, the soft scientists make themselves even more ridiculous. (Not less dangerous, alas!) In spite of its name, software engineering requires (cruelly) hard science for its support. — Edsger W. Dijkstra

Progress is possible only if we train ourselves to think about programs without thinking of them as pieces of executable code. — Edsger W. Dijkstra

Computer Science is no more about computers than astronomy is about telescopes — Edsger W. Dijkstra

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

Besides a mathematical inclination, an exceptionally good mastery of one's native tongue is the most vital asset of a competent programmer. — Edsger W. Dijkstra

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. — Edsger W. Dijkstra

Raise your quality standards as high as you can live with, avoid wasting your time on routine problems, and always try to work as closely as possible at the boundary of your abilities. Do this, because it is the only way of discovering how that boundary should be moved forward. — Edsger W. Dijkstra