Answ. As is before said, When it is against either justice or charity. 1. When it is like cheating bargaining, which under pretence of consent and a form of justice doth deceive or oppress, and get from another that which is not truly ours but his. 2. When you lend for increase where charity obligeth you to lend freely; even as it is a sin to lend expecting your own again, when charity obligeth you to give it. 3. When you uncharitably exact that which your brother is disabled utterly to pay, and use cruelty to procure it (be it the use or the principal). 4. When you allow him not such a proportion of the gain as his labour, hazard, or poverty doth require; but because the money is yours, will live at ease upon his labours. 5. When in case of his losses you rigorously exact your due without that abatement, or forgiving debts, (whether use or principal,) which humanity and charity require. In a word, when you are selfish, and do not as, according to true judgment, you may desire to be done by, if you were in his case.
Quest. But when am I bound to exercise this charity in not taking use?
Answ. As I said before, 1. Whenever you have no more urgent, and necessary, and excellent work, to lay out that money on, which you are so to receive. 2. Yea, though another work may be in itself better, (as to relieve many poorer, better men with that money,) yet when you cannot take it, without the utter undoing of the debtor, and bringing him into as bad a case, as any single person whom you would relieve, it is the safer side to leave the other unrelieved, (unless it be a person on whom the public good much dependeth,) rather than to extort your own from such a one to give another. Because that which you cannot get without a scandalous appearance of cruelty, is quoad jus in re not yours to give, till you can better get possession of it; and therefore God will not expect that you should give it to another.
In all this I imply that as you must prefer the lives of others in giving alms, before your own conveniences and comforts, and must not say, I cannot spare it, when your necessity may spare it, though not your pleasure; so also in taking use of those that you are bound to show charity to, the same rule and proportions must be observed in your charity.
Note also, that in all this it appeareth, that the case is but gradually different, between taking the use and taking the principal. For when the reason for remitting is the same, you are as well bound to remit the principal as the use.
But this difference there is, that many a man of low estate may afford to lend freely to a poorer man for a little time, who cannot afford to give it. And prudence may direct us to choose one man to lend freely to for a time, because of his sudden necessity, when yet another is fitter to give it to.
Quest. XIII. Is lending a duty? If so, must I lend to all that ask me, or to whom?
Answ. Lending is a duty, when we have it, and our brother's necessity requireth it, and true prudence telleth us, that we have no better way to lay it out, which is inconsistent with that. And therefore rich men ordinarily should both lend and give as prudence shall direct. But there is an imprudent and so a sinful lending: as, 1. When you will lend that which is another's, and you have no power to lend. 2. When you lend that which you must needs require again, while you might easily foresee that the borrower is not like to pay. Lend nothing but what you have either great probability will be repaid, or else which you are willing to give in case the debtor cannot or will not pay; or at least when suing for it will not have scandalous and worse effects than not lending. For it is very ordinary when you come to demand it and sue for it, to stir up the hatred of the debtor against you, and to make him your enemy, and to break his charity by your imprudent charity; in such a case, if you are obliged to relieve him, give him so much as you can spare, rather than lend him that which you cannot spare, but must sue for. In such cases, if charity go not without prudence, nor prudence without charity, you may well enough see when to lend, and how much.
Quest. XIV. Is it lawful to take upon usury in necessity, when the creditor doth unjustly or unmercifully require it?
Answ. Not in case that the consequents (by encouraging sin or otherwise) be like to do more hurt, than the money will do you good. Else, it is lawful when it is for your benefit; as it is lawful to take part of your wages for your work, or part of the worth of your commodity, when you cannot have the whole; and as it is lawful to purchase your rights of an enemy, or your life of a thief; as is aforesaid. A man may buy his own benefit of an unrighteous man.