Etc Books

“[on interest from loans] Now that I have loaned you them (100 gulden), you cause me a double loss due to my not being able to pay on the one hand nor buy on the other, so that I have to lose on both sides, and this is called duplex interesse, damni emergentis et lucri cessantis.... on hearing that John sustained losses on his loan of 100 gulden and demands just damages, they rush in and charge double on every 100 gulden, such double reimbursement, namely, for the loss due to non-payment and to inability to make a profit on a bargain, just as though these 100 gulden had the double loss grown on to them, so that whenever they have 100 gulden, they loan them out and charge for two losses, which they have not at all sustained... Therefore you are a usurer, who takes damages out of his neighbour's money for an imaginary loss that you did not sustain at all, and which you can neither prove nor calculate. This sort of loss is called by the jurists non verum, sed phantasticum interesse. It is a loss which each conjures up for himself... It will not do to say, therefore, that there could have been losses because I could not have been able to pay or buy. Else it would mean ex contingente necessarium, which is making something out of a thing that is not, and a thing that is uncertain into a thing that is absolutely sure. Would not such usury devour the world in a few years? ... If an unhappy accident befalls him against his will, and he must recover from it, he may demand damages for it, but it is different in trade and just the reverse. There they scheme to profit at the expense of their needy neighbours, how to amass wealth and get rich, to be lazy and idle and live in luxury on the labour of others, without any care, danger, and loss. To sit by the stove and let my 100 gulden gather wealth for me in the country and yet keep them in my pocket, because they are only loaned, without any danger or risk; my friend, who would not like that?”
― Martin Luther