Don’t run up debts, except for the huge debt of love you owe each other. When you love others, you complete what the law has been after all along. The law code—don’t sleep with another person’s spouse, don’t take someone’s life, don’t take what isn’t yours, don’t always be wanting what you don’t have, and any other “don’t” you can think of—finally adds up to this: Love other people as well as you do yourself. You can’t go wrong when you love others. When you add up everything in the law code, the sum total is love.
Romans 13:10 MSG
Christians must avoid useless expense, and be careful not to contract any debts they have not the power to discharge. They are also to stand aloof from all venturesome speculations and rash engagements, and whatever may expose them to the danger of not rendering to all their due. Do not keep in any one’s debt. Give every one his own. Do not spend that on yourselves, which you owe to others. But many who are very sensible of the trouble, think little of the sin, of being in debt. Love to others includes all the duties of the second table. The last five of the ten commandments are all summed up in this royal law, Thou shalt love thy neighbour as thyself; with the same sincerity that thou lovest thyself, though not in the same measure and degree. He that loves his neighbour as himself, will desire the welfare of his neighbour. On this is built that golden rule, of doing as we would be done by. Love is a living, active principle of obedience to the whole law. Let us not only avoid injuries to the persons, connexions, property, and characters of men; but do no kind or degree of evil to any man, and study to be useful in every station of life. Matthew Henry