same thing, the whole price of it, is in this manner originally distributed among some of its different members. Wages, profit, and rent, are the three original sources of all revenue as well as of all exchangeable value. All other revenue is ultimately derived from some one or other of these.

Whoever derives his revenue from a fund which is his own, must draw it either from his labour, from his stock, or from his land. The revenue derived from labour is called wages. That derived from stock, by the person who manages or employes it, is called profit. That derived from it by the person who does not employ it himself, but lends it to another, is called the interest or the use of money.

It is the compensation which the borrower pays to the lender, for the profit which he has an opportunity