16 I desire then to address you again on the subject of oaths; but I feel ashamed. For to me, indeed, it is not wearisome both by day and by night to repeat the same things to you. But I am afraid, lest, having followed you up so many days, I should seem to condemn you of great listlessness, that you should require continual admonition respecting so easy a matter. And I am not only ashamed, but also in fear for you! For frequent instruction to those who give heed, is salutary and profitable; but to those who are listless, it is injurious, and exceedingly perilous; for the oftener any one hears, the greater punishment does he draw upon himself, if he does not practise what is told him.
With this accordingly God reproached the Jews, speaking thus: “I have sent my prophets, rising up early, and sending them; and even then ye did not hearken.” We therefore do this of our great care for you. But we fear, lest, on that tremendous Day, this admonition and counsel should rise up against you all. For when the point to be attained is easy, and he whose office it is continually to admonish, desists not from his task, what defence shall we have to offer? Or what argument will save us from punishment?
Tell me, if a sum of money chance to be due to you, do you not always, when you meet the debtor, remind him of the loan? Do thou too act thus; and let every one suppose that his neighbour owes him money, viz., the fulfilling of this precept; and upon meeting him, let him put him in mind of the payment, knowing that no small danger lies at our door, while we are unmindful of our brethren. For this cause I too cease not to make mention of these things. For I fear, lest by any means I should hear it said on that day, “O wicked and slothful servant, you ought to have put my money to the exchangers.” Behold, however, I have laid it down, not once, or twice, but oftentimes.
It is left then for you to discharge the usury of it. Now the usury of hearing is the manifestation of it by deeds, for the deposit is the Lord's. Therefore let us not negligently receive that with which we are entrusted; but let us keep it with diligence, that we may restore it with much interest on That Day. For unless thou bring others to the performance of the same good works, you shall hear that voice, which he who buried the talent heard. But God forbid it should be this! But may you hear that different voice which Christ uttered, saying to him who had made profit, “Well done, good and faithful servant; you have been faithful over a few things, I will make you ruler over many things.”
Source: Homilies on the Statues (New Advent)