Science is what we understand well enough to explain to a computer. Art is everything else we do.
I try to learn certain areas of computer science exhaustively; then I try to digest that knowledge into a form that is accessible to people who don't have time for such study.
An algorithm must be seen to be believed.
I define UNIX as 30 definitions of regular expressions living under one roof.
It is much more rewarding to do more with less.
TeX has found at least one bug in every Pascal compiler it's been run on, I think, and at least two in every C compiler