Therefore, if the borrower did not derive any profit from the loan, the sum lent had in fact been sterile, and obviously the just price of the loan was the return of the amount lent; if, on the contrary, the borrower had made a profit from it, it was the reward of his labour, and not the fruit of the loan itself. To repay more than the sum lent would therefore be to make a payment to one person for the labour of another.[1] The exaction of usury was therefore the exploitation of another man's exertion.[2] [Footnote 1: Gerson, _De Cont._, iv. 15.] [Footnote 2: Neumann, when he says that 'it was sinful to recompense the use of capital belonging to another' (_Geschichte des Wuchers in Deutschland_, p. 25), seems to miss the whole point of the discussion. The teaching of the canonists on rents and partnership shows clearly that the owner of capital might draw a profit from another's labour, and the central point of the usury teaching was that money which has been lent, and employed so as to produce a profit by the borrower, belongs not 'to another,' but to the very man who employed it, namely, the borrower.] It is interesting to notice how closely the rules applying in the case of sales were applied to usury. The raising of the price of a loan on account of some special benefit derived from it by the borrower is precisely analogous to raising the sale price of an object because it is of some special individual utility to the buyer. On the other hand, as we shall see further down, any special damage suffered by the lender was a sufficient reason for exacting something over and above the amount lent; this was precisely the rule that applied in the case of sales, when the seller suffered any special damage from parting with the object sold. Thus the analogy between sales and loans was complete at every point. In both, equality of sacrifice was the test of justice. Nor could it be suggested that the delay in the repayment of the loan was a reason for increasing the amount to be repaid, because this really amounted to a sale of time, which, of its nature, could not be owned.[1] [Footnote 1: Rambaud, _op. cit._, p. 63; Aquinas(?), _De Usuris_, i. 4.]