Programming is the art of telling another human being what one wants the computer to do.

The psychological profiling [of a programmer] is mostly the ability to shift levels of abstraction, from low level to high level. To see something in the small and to see something in the large.

An algorithm must be seen to be believed.

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

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.

I've never been a good estimator of how long things are going to take.

I define UNIX as 30 definitions of regular expressions living under one roof.