The Wealth of Nations by Part 2 Chapter 4 Page 4

so great a quantity of goods, advanced to them upon credit by shopkeepers and tradesmen, that they find it necessary to borrow at interest in order to pay the debt. The capital borrowed replaces the capitals of those shopkeepers and tradesmen, which the country gentlemen could not have replaced from the rents of their estates. It is not properly borrowed in order to be spent, but in order to replace a capital which had been spent before.

Almost all loans at interest are made in money, either of paper, or of gold and silver.

But what the borrower really wants, and what the lender really supplies him with, is not the money, but the money’s worth, or the goods which it can purchase. If he wants it as a stock for immediate consumption, it is those goods only which he can place in that