“A common mistake people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.”

Douglas Adams

“My first program taught me a lot about the errors that I was going to be making in the future, and also about how to find errors. That’s sort of the story of my life, making errors and trying to recover from them. I try to get things correct. I probably obsess about not making too many mistakes.”

Donald E. Knuth