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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 employs 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 of making

by the use of the money. Part of that profit naturally belongs to

the borrower, who runs the risk and takes the trouble of

employing it, and part to the lender, who affords him the

opportunity of making this profit.