owning capital is not a productive activity.

Unequal distribution of income is an excessively uneconomic method of getting the necessary saving done.

It is the rate of investment which governs the rate of saving, and not vice versa.

New ideas are difficult just because they are new. Repetition has somehow plastered over the gaps and inconsistencies in the old ones, and the new cannot penetrate.

The fundamental differences between Marxian and traditional orthodox economics are, first, that the orthodox economists accept the capitalist system as part of the eternal order of Nature, while Marx regards it as a passing phase in the transition from the feudal economy of the past to the socialist economy of the future.

The first essential for economists ... is to ... combat, not foster, the ideology which pretends that values which can be measured in terms of money are the only ones that ought to count.

Economic theorists should not make such a production about taking a rabbit out of a hat after having put the rabbit into the hat in full view of the audience.