"Defect-free software does not exist."

"At the time the Sendmail program had a very poor reputation with respect to security, with four root vulnerabilities per year for two successive years."

"To write the lives of the great in separating them from their works necessarily ends by above all stressing their pettiness, because it is in their work that they have put the best of themselves."

"I write when I'm inspired, and I see to it that I'm inspired at nine o'clock every morning."

"Isn't one of your first exercises in learning how to communicate to write a description of how to tie your shoelaces? The point being that it's basically impossible to use text to show that."

"I thought, well I can do that. I couldn't be bothered writing a book review, because I'd have to read the book, I haven't got time to read a whole book for a fifty dollar write-up."