Fisher's Fundamental Theorem states — in terms appropriate to the present context — that the better adapted a system is to a particular environment, … - Gerald M. Weinberg

each program has an appropriate level of care and sophistication dependent on the uses to which it will be put. Working above that level is, in a way, even less professional than working below it. If we are to know whether an individual programmer is doing a good job, we shall have to know whether or not he is working on the proper level for his problem.

The value of documentation is only to be realized if the documentation is well done. If it is poorly done, it will be worse than no documentation at all.

"One of my clients told me the story of the optimist and the pessimist who were arguing about philosophy. The optimist declares,"This is the best of all possible worlds." The pessimist sighs and says, "You're right.