...even professors of economics, to say nothing of the public, do not generally have scientific minds.

The possibility of saying anything about a thing rests on the assumption that it preserves its identity, or continues to be the same thing in the respect described, that it will behave in future situations as it has in past.

Never waste any time you can spend sleeping.

It is true practically if not altogether without exception that the changes studied by any science tend to equilibrate or neutralize the forces which bring them about, and finally to come to rest.

Costs merely register competing attractions.

All science is static in the sense that it describes the unchanging aspects of things.

I have been....moved to wonder whether my job is a job or a racket, whether economists, and particularly economic theorists, may not be in the position that Cicero, citing Cato, ascribed to the augurs of Rome-that they should cover their faces or burst into laugher when they met on the street.