Again, most of the chief distinctions marked by economic terms are differences not of kind but of degree.

In common use almost every word has many shades of meaning, and therefore needs to be interpreted by the context.

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

All labour is directed towards producing some effect.

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

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

Consumption may be regarded as negative production.