To understand a program, you must become both the machine and the program.
In software systems it is often the early bird that makes the worm.
Motto for a research laboratory: what we work on today, others will first think of tomorrow.
In programming, as in everything else, to be in error is to be reborn.
Once you understand how to write a program get someone else to write it.
In English every word can be verbed. Would that it were so in our programming languages.