Premature optimization is the root of all evil.

The enjoyment of one's tools is an essential ingredient of successful work.

I decry the current tendency to seek patents on algorithms. There are better ways to earn a living than to prevent other people from making use of one's contributions to computer science.

Science is knowledge which we understand so well that we can teach it to a computer; and if we don't fully understand something, it is an art to deal with it.

Programming is legitimate and necessary academic endeavour.

We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil.

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