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
Donald KnuthScience is what we understand well enough to explain to a computer. Art is everything else we do.
Donald KnuthMeta-design is much more difficult than design; it's easier to draw something than to explain how to draw it.
Donald KnuthProgrammers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered. We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil. Yet we should not pass up our opportunities in that critical 3%.
Donald Knuth