Eventually, I decided that thinking was not getting me very far and it was time to try building.

Using Unix is the computing equivalent of listening only to music by David Cassidy.

Object-oriented design is the roman numerals of computing.

Productivity is most important by engineering management rules, but enjoyment is most important for engineers. One stems from the other.

Rule 1. You can't tell where a program is going to spend its time. Bottlenecks occur in surprising places, so don't try to second guess and put in a speed hack until you've proven that's where the bottleneck is

A smart terminal is not a smartass terminal, but rather a terminal you can educate.

When there is no type hierarchy you don't have to manage the type hierarchy.