2 Samuel 12:11

But that you may clearly know that his censure and sacred considerations deal more with actions than with persons themselves, hear how God, the judge, who many times gave sentences favorable to his servant David, often gave decisions unfavorable to him. This happened in a …

Therefore, Nathan went to David and wove a dramatic act for judgment. And what did he say? "My king, I want your judgment. There was a certain rich man and a certain poor one. The rich person possessed herds of cattle and many other flocks; and the poor one had one ewe that drank from his glass, ate from his table and slept in his embrace." Here Nathan revealed the genuine bond between a husband and wife. "When a certain stranger arrived, the rich man desired to keep his own animals, and he took the poor man's ewe and slaughtered her." Here, do you see how Nathan wove the dramatic act, mysteriously concealing the weapon in the glands of David's throat? Then what did the king say? Thinking that he had to pass judgment against someone else, he decided most severely. For such are human beings. When it concerns other people, they gladly and abruptly render decisions and publicize them. And what did David say? "As the Lord lives, the man who did this thing is worthy of death. And he shall restore the lamb fourfold." Therefore, what did Nathan reply? He did not allow the wound to be relieved for many hours; rather, he quickly stripped it naked and sharply embedded the knife deeply into it, so as not to rob it of the painful sensation. "You are the man, my king." What did the king say? "I have sinned against the Lord." He did not say, "Who are you who censures me? Who sent you to speak with such boldness? With what daring did you prevail?" He did not say anything of the sort; rather, he perceived the sin. And what did he say? "I have sinned against the Lord." Therefore, what did Nathan say to him? "And the Lord remitted your sin." You condemned yourself; I [God] remit your sentence. You confessed prudently; you annulled the sin. You appropriated a condemnatory decision against yourself; I repealed the sentence. […]

Thus, the prophets' sayings are of three classes: one class refers to the earthly, a second to the heavenly Jerusalem, and a third to both simultaneously. It will be best to support this assertion with illustration. The prophet Nathan was sent to accuse King David of a grave sin and to foretell what evils were to befall him on this account. Now no one can fail to see that this prophecy refers to the earthly city. There are others like it, sometimes addressed to the people at large for their profit and well-being, and sometimes to an individual who merited a word from God to foreknow some event for the guidance of his temporal life.

And David, who was a man after God's own heart, who because of his virtues was found worthy to generate from his seed the promise of the Fathers, and to have Christ shine forth from himself for the salvation of all the world, was he …

As face answers to face in a glass, so does the punishment often answer to the sin; here is blood for blood and uncleanness for uncleanness. And thus God would show how much he hates sin, even in his own people, and that, wherever he find it, he will not let it go unpunished.