Here is what Saint John Chrysostom has to say about today’s Gospel (Mt 18: 15-20). I can’t help being reminded of Saint Benedict’s chapter on the concern that the abbot should show for wayward brothers, and his emphasis on correction as healing.
He does not say “accuse him” or “punish him” or “take him to court.” He says “correct him.” For he is possessed, as it were, by some stupor, and drunk in his anger and disgrace. The one who is healthy must go to the one who is sick. You must conduct your judgment of him privately. Make your cure easy to accept. For the words “correct him” mean nothing other than help him see his indiscretion. Tell him what you have suffered from him.
What then if he does not listen, if he stubbornly flares up? Call to your side someone else or even two others, so that two witnesses may corroborate all that’s said. For the more shameless and boldfaced he is, so much the more must you be earnest towards his cure, not toward satisfying your anger and hurt feelings. For when a physician sees the sickness unyielding, he does not stand aside or take it hard but then is all the more earnest. That then is what Christ orders us to do. You appeared too weak since you were alone, so become stronger with the help of others. Two are sufficient to reprove the wrongdoer. Do you see how he seeks the interest not of the agrieved party alone but also that of the one who caused grief? For the person injured may be the one who is more taken captive by passion. He becomes the one that is diseased and weak and infirm.
This effort may occur many times, as he attempts to lead him first alone and then with others. If he persists, then make the effort with the whole congregation. “Tell it,” he says, “to the church.” If he had sought the interest of the aggrieved alone, he would not have told him to approach the sick individual seventy-seven times. He would not have attempted so many times or brought so many treatment to the malady. He might have just let him be if he persisted uncorrected from the first meeting. But instead he shows us how to seek his cure once, twice, and many times: first alone, then with two, then with many more.
Chrysostom, The Gospel of Matthew, Homily 60.1, quoted in Manlio Simonetti (ed), Matthew 14 – 28, Ancient Christian Commentary on Scripture New Testament Ib, (InterVarsity Press, 2002) 76-77.