Consumption may be regarded as negative production.

Capital is that part of wealth which is devoted to obtaining further wealth.

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

Slavery was regarded by Aristotle as an ordinance of nature, and so probably was it by the slaves themselves in olden time.

In every age poets and social reformers have tried to stimulate the people of their own time to a nobler life by enchanting stories of the virtues of the heroes of old.

All labour is directed towards producing some effect.

The most valuable of all capital is that invested in human beings