Physicists only talk to physicists, economists to economists-worse still, nuclear physicists only talk to nuclear physicists and econometricians to econometricians. One wonders sometimes if science will not grind to a stop in an assemblage of walled-in hermits, each mumbling to himself words in a private language that only he can understand.

Theories without facts may be barren, but facts without theories are meaningless.

The controversy as to whether socialism is possible has been settled by the fact that it exists, and it is a fundamental axiom of my philosophy, at any rate, that anything that exists, is possible.

Economists and technologists bring the "bits", but it requires the social scientists and humanists to bring the "wits.

Economics, we learn in the history of thought, only became a science by escaping from the casuistry and moralizing of medieval thought.

It is absurd to suppose we can think of nature as a system apart from knowledge, for it is knowledge that is increasingly determining the course of nature.

Where there is hypocrisy, there is hope.