Testing shows the presence, not the absence of bugs.

I don't need to waste my time with a computer just because I am a computer scientist.

Simplicity and elegance are unpopular because they require hard work and discipline to achieve and education to be appreciated.

We are all shaped by the tools we use, in particular: the formalisms we use shape our thinking habits, for better or for worse, and that means that we have to be very careful in the choice of what we learn and teach, for unlearning is not really possible.

Computer science has as much to do with computers as astronomy has to do with telescopes.

If there is one 'scientific' discovery I am proud of, it is the discovery of the habit of writing without publication in mind.

Don't blame me for the fact that competent programming, as I view it as an intellectual possibility, will be too difficult for the average programmer, you must not fall into the trap of rejecting a surgical technique because it is beyond the capabilities of the barber in his shop around the corner.