APL is a mistake, carried through to perfection.

Raise your quality standards as high as you can live with, avoid wasting your time on routine problems, and always try to work as closely as possible at the boundary of your abilities. Do this, because it is the only way of discovering how that boundary should be moved forward.

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

APL is a mistake, carried through to perfection.

Progress is possible only if we train ourselves to think about programs without thinking of them as pieces of executable code.

I would therefore like to posit that computing's central challenge, how not to make a mess of it, has not yet been met.

Brainpower is by far our scarcest resource.