Matt. XVIII. 15.
“If your brother shall trespass against you, go and tell him his fault between you and him alone. If he shall hear you, you have gained your brother.”
For, since He had used vehement language against them that cause offense, and on every hand had moved them to fear; in order that the offended might not in this way on the other hand become supine, neither supposing all to be cast upon others, should be led on to another vice, soften in themselves, and desiring to be humored in everything, and run upon the shoal of pride; do you see how He again checks them also, and commands the telling of the faults to be between the two alone, lest by the testimony of the many he should render his accusation heavier, and the other, become excited to opposition, should continue incorrigible.
Wherefore He says, “Between you and him alone,” and, “If he shall hear you, you have gained your brother.” What is, “If he shall hear you?” If he shall condemn himself, if he shall be persuaded that he has done wrong.
“You have gained your brother.” He did not say, You have a sufficient revenge, but, “You have gained your brother,” to show that there is a common loss from the enmity. For He said not, “He has gained himself only,” but, “thou too hast gained him,” whereby He showed that both the one and the other were losers before this, the one of his brother, the other of his own salvation.
This, when He sat on the mount also, He advised; at one time bringing him who has given the pain to him that had been pained, and saying, “Be reconciled to your brother,” and at another commanding him that had been wronged to forgive his neighbor. For He taught men to say, “Forgive us our debts, like as we forgive our debtors.”
But here He is devising another mode. For not him that gave the pain, does He now call upon, but him that was pained He brings to this one. For because this who has done the wrong would not easily come to make excuse, out of shame, and confusion of face, He draws that other to him, and not merely so, but in such way as also to correct what has been done. And He says not, “Accuse,” nor “Charge him,” nor “Demand satisfaction, and an account,” but, “Tell him of his fault,” says He. For he is held in a kind of stupor through anger and shame with which he is intoxicated; and thou, who art in health, must go your way to him that is ill, and make the tribunal private, and the remedy such as may be readily received. For to say, “Tell him of his fault,” is nothing else than “Remind him of his error,” tell him what you have suffered at his hand, which very thing, if it be done as it ought, is the part of one making excuse for him, and drawing him over earnestly to a reconciliation.
What then, if he should disobey, and be disposed to abide in hardness? “Take with yourself yet one or two, that in the mouth of two witnesses every word may be established.” For the more he is shameless, and bold, the more ought we to be active for his cure, not in anger and indignation. For the physician in like manner, when he sees the malady obstinate, does not give up nor grow impatient, but then makes the more preparation; which He commands us to do in this case too.
For since you appeared to be too weak alone, make yourself more powerful by this addition. For surely the two are sufficient to convict him that has sinned. Do you see how He seeks not the good of him that has been pained only, but of him also that has given the pain. For the person injured is this one who is taken captive by his passion, he it is that is diseased, and weak, and infirm. Wherefore He often sends the other to this one, now alone, and now with others; but if he continue in it, even with the church. For, “Tell it,” says He, “to the Church.” For if He were seeking this one's advantage only, He would not have commanded to pardon, seventy times seven, one repenting. He would not so often have set so many over him to correct his passion; but if he had remained incorrigible after the first conference would have let him be; but now once, and twice, and thrice, He commands to attempt his cure, and now alone and now with two, now with more.
Wherefore, with respect to them that are without He says no such thing, but, “If any one smite you,” He says, “on your right cheek, turn to him the other also,” but here not in such wise. For what Paul means, saying, “What have I to do to judge them also that are without?” but the brethren he commands both to tell of their faults, and to avoid them, and to cut them off, not being obedient, that they may be ashamed; this Himself also does here, making these laws about the brethren; and He sets three over him for teachers and judges, to teach him the things that are done at the time of his drunkenness. For though it be himself that has said and done all those unreasonable things, yet he will need others to teach him this, like as the drunken man. For anger and sin is a more frantic thing than any drunkenness, and puts the soul in greater distraction.
Who, for instance, was wiser than David? Yet for all that, when he had sinned he perceived it not, his lust keeping in subjection all his reasoning powers, and like some smoke filling his soul. Therefore he stood in need of a lantern from the prophet, and of words calling to his mind what he had done. Wherefore here also He brings these to him that has sinned, to reason with him about the things he had done.
2. But for what reason does He command this one to tell him of his fault, and not another? Because this man he would endure more quietly, this, who has been wronged, who has been pained, who has been despitefully used. For one does not bear in the same way being told by another of one's fault concerning him that has been insulted, as by the insulted person himself, especially when this person is alone convicting him. For when he who should demand justice against him, even this one appears to be caring for his salvation, this will have more power than anything in the world to shame him.
Do you see how this is done not for the sake of just punishment, but of amendment? Therefore He does not at once command to take with him the two, but when himself has failed; and not even then does He send forth a multitude against him; but makes the addition no further than two, or even one; but when he has contemned these too, then and not till then He brings him out to the church.
So much earnestness does He show, that our neighbor's sins be not exposed by us. And indeed He might have commanded this from the first, but that this might not be, He did not command it, but after a first and second admonition He appoints this.
But what is, “In the mouth of two or three witnesses every word shall be established?” You have a sufficient testimony. His meaning is, that you have done all your part, that you have left undone none of the things which it pertained to you to do.
“But if he shall neglect to hear them also, tell it to the church,” that is, to the rulers of it; “but if he neglect to hear the church, let him be to you as an heathen man and a publican.” For after this such a one is incurably diseased.
But mark thou, I pray you, how everywhere He puts the publican for an example of the greatest wickedness. For above too He says, “Do not even the publicans the same?” And further on again, “Even the publicans and the harlots shall go before you into the Kingdom of Heaven,” that is, they who are utterly reprobated and condemned. Let them hearken, who are rushing upon unjust gains, who are counting up usuries upon usuries.
Source: Homilies on the Gospel of St. Matthew (New Advent)