Musar su Proverbi 17:10

But the one who does not get aroused by the voice of his rebukers will double his iniquities. For they reprimanded him and he hardened his heart - as it is stated (Proverbs 17:10-11), "A rebuke works on an intelligent man, more than one hundred blows on a fool. An evil man seeks only to rebel; a cruel messenger will be sent against him." The explanation is that the evil man will not submit to the voice of the rebukers. Rather he will seek to rebel. And since he did not stop from the words of the reprimanding angel, a cruel angel will be sent against him - measure for measure. For rebukers are called angels (malakhim, which literally means messengers), as it is stated (II Chronicles 36:16), "But they mocked the messengers of God and disdained His words and taunted His prophets." And King Solomon, peace be upon him, also said (Proverbs 15:10), "Discipline seems bad to him who forsakes the way; he who spurns rebuke will die." Its explanation is [that] it is true that harsh rebuke is appropriate for one who has forsaken the way and transgresses the words of the Torah. However there is hope that he will take the rebuke and repent from his evil way. But worse than him is one who hates rebuke. For he has no hope and rectification from harsh rebuke. Rather his one verdict is to die. For one who does a transgression - his desire overpowered him and the impulse pushed him. But it is likely that his soul is bitter about that which he was [not stronger] in the face of his impulse. And maybe he longs for reprimand and hopes for reproof. But one who hates reprimand has already abandoned his soul; and his hatred for reprimand will be a proof that he hates the words of God, may He be blessed.

And a man may flatter his wife for the sake of peace in his home, and he may flatter his creditor so that he does not oppress him, and his teacher so that he will teach him Torah. And it is a very good deed to flatter one's pupils or companions so that that they will study and hearken to his words, accepting his reproof to observe the commandments. Likewise one may flatter any man where he thinks that he will thereby draw him to him, so that he will listen to him, and perform the commandments. If he were to come to him with anger, the man would not listen to him, but if he comes to him with flattery, the man will accept his rebuke. In such a case, it is a very good deed to flatter him in order to bring forth the precious from the vile. For there is a man that will not accept a rebuke when it is delivered with scolding, but will when it is done gently, as it is said, "The words of the wise spoken in quiet" (Eccl. 9. 17). There are times, however, when scolding is necessary, as it is said, "A rebuke entereth deeper into a man of understanding" (Prov. 17:10). And there are times when even a lashing is proper, as it is said, "And stripes for the back of fools" (Prov. 19:29). And there are times when even a lashing will do no good, as it is said, "Than a hundred stripes unto a fool" (Prov. 17:10). If so, what shall we do to him? There is no way of correcting him, therefore you must drive him away.