Producer's Surplus is a convenient name for the genus of which the rent of land is the leading species.

And very often the influence exerted on a person's character by the amount of his income is hardly less, if it is less, than that exerted by the way in which it is earned.

The most reckless and treacherous of all theorists is he who professes to let facts and figures speak for themselves.

Though a simple book can be written on selected topics, the central doctrines of economics are not simple and cannot be made so.

Knowledge is our most powerful engine of production.

All wealth consists of desirable things; that is, things which satisfy human wants directly or indirectly: but not all desirable things are reckoned as wealth.

Nature's action is complex: and nothing is gained in the long run by pretending that it is simple, and trying to describe it in a series of elementary propositions.