Software entities (classes, modules, functions, etc.) should be open for extension, but closed for modification.

- Bertrand Meyer

Ask not first what the system does; ask what it does it to!

- Bertrand Meyer

Constants are widely known for the detestable practice of changing their values; we should prepare ourselves against the consequences of such ficklen…

- Bertrand Meyer

I think Smalltalk is inappropriate for serious industrial developments. After all, run time is a little late to find out whether you have a landing g…

- Bertrand Meyer

Correctness is clearly the prime quality. If a system does not do what it is supposed to do, then everything else about it matters little.

- Bertrand Meyer

I have always felt sympathy towards the biologists who accept to debate creationists. Now I also understand them better; one can fight opinions, not …

- Bertrand Meyer

C++ is the only current language making COBOL look good

- Bertrand Meyer

The role of a trainer or consultant is to empower the customer, not to make himself indispensable

- Bertrand Meyer

Careful as they may be, developers of Eiffel libraries will always run into cases in which, after releasing a library class, they suddenly experience…

- Bertrand Meyer