Defining OO as based on the use of class hierarchies and virtual functions is also practical in that it provides some guidance as to where OO is likely to be successful.

Any verbose and tedious solution is error-prone because programmers get bored.

Our civilization depends critically on software, and we have a dangerously low degree of professionalism in the computer fields

An organisation that treats its programmers as morons will soon have programmers that are willing and able to act like morons only.

Always think about how a piece of code should be used: good interfaces are the essence of good code. You can hide all kinds of clever and dirty code behind a good interface if you really need such code.

My impression was and is that many programming languages and tools represent solutions looking for problems, and I was determined that my work should not fall into that category. Thus, I follow the literature on programming languages and the debates about programming languages primarily looking for ideas for solutions to problems my colleagues and I have encountered in real applications. Other programming languages constitute a mountain of ideas and inspiration-but it has to be mined carefully to avoid featurism and inconsistencies.

A program that has not been tested does not work.