Science is knowledge which we understand so well that we can teach it to a computer; and if we don't fully understand something, it is an art to deal with it.

The best practice is inspired by theory.

How can you own numbers? Numbers belong to the world.

Programs are meant to be read by humans and only incidentally for computers to execute.

The best theory is inspired by practice.

We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil.

The enjoyment of one's tools is an essential ingredient of successful work.