In the practical world of computing, it is rather uncommon that a program, once it performs correctly and satisfactorily, remains unchanged forever.

In the practical world of computing, it is rather uncommon that a program, once it performs correctly and satisfactorily, remains unchanged forever.

Usually its users discover sooner or later that their program does not deliver all the desired results, or worse, that the results requested were not the ones really needed.

Reliable and transparent programs are usually not in the interest of the designer.

During the process of stepwise refinement, a notation which is natural to the problem in hand should be used as long as possible.

The idea that one might derive satisfaction from his or her successful work, because that work is ingenious, beautiful, or just pleasing, has become ridiculed.

A primary cause of complexity is that software vendors uncritically adopt almost any feature that users want.