(15) Moreover if thy brother shall trespass.--Better, and if thy brother shall sin. A twofold train of thought is traceable in what follows. (1.) The presence of "offences" implies sin, and the question arises how each man is to deal with those sins which affect himself personally. (2.) The dispute in which the teaching recorded in this chapter had originated implied that the unity of the society which was then represented by the Twelve, had for the time been broken. Each of the disciples thought himself, in some sense, aggrieved by others. Sharp words, it may be, had been spoken among them, and the breach had to be healed.

Go and tell him his fault.--The Greek is somewhat stronger, convict him of his fault, press it home on him in such a way as to reach his reason and his conscience. (Comp. John 16:8.) But this is to be done "between thee and him alone." Angry words spoken in the presence of others would fail of that result. It is significant that the substance of the precept is taken from the passage in Leviticus (Leviticus 19:17-18) which ends with "Thou shalt love thy neighbour as thyself."

Thou hast gained thy brother.--The words in part derive their force from the subtle use of a word in one sense which men associated commonly with another. "Gain" of some kind, aimed at, or wrongfully withheld, was commonly the origin of disputes and litigation. A man hoped to reap some profit by going to law. In the more excellent way which our Lord points out, he would by sacrificing the lower gain, attain the higher, and win for God (see 1Corinthians 9:19, 1Peter 3:1, for this aspect of the word) and for himself the brother with whom he had been at variance.

Verses 15-20. - Correction of an offending brother. Verse 15. - Hitherto the discourse has warned against offending the young and weak; it now teaches how to behave when the offence is directed against one's self. Moreover (δὲ, "now," introducing a new subject) if thy brother shall trespass against thee (εἰς σέ). The brother is a brother in the faith, a fellow Christian. The words, "against thee," are omitted in the Sinaitic and Vatican Manuscripts, and by some modern editors, on the ground that it is a gloss derived from Peter's question (ver. 21). The words are retained by the Vulgate and other high authorities. Without them, the passage becomes one of a general nature, applying to all offences. Retaining them, we find a direction how to treat one who offers personal offence to ourselves - which seems to suit the context best. In the case of private quarrels between individual Christians, with the view of reconciliation, there are four steps to be taken. First, private remonstrance: Go. Do not wait for him to come to you; make the first advances yourself. This, as being the more difficult course, is expressly enjoined on one who is learning the lesson of humility. Tell him his fault; ἔλεγξον αὐτόν,: corripe eum. Put the fault plainly before him, show him how he has wronged you, and how he has offended God. This must be done in private, gently, mercifully. Such treatment may win the heart, while public rebuke, open denunciation, might only incense and harden. Plainly, the Lord primarily contemplates quarrels between individual Christians; though, indeed, the advice here and in the sequel is applicable to a wider sphere and to more important occasions. Thou hast gained thy brother. If he shall own his fault, and ask for pardon, thou hast won him for God and thyself. A quarrel is a loss to both parties; a reconciliation is a gain for both. The verb "to gain" (κερδαίνω) is used elsewhere in this high sense (see 1 Corinthians 9:19; 1 Peter 3:1).

18:15-20 If a professed Christian is wronged by another, he ought not to complain of it to others, as is often done merely upon report, but to go to the offender privately, state the matter kindly, and show him his conduct. This would generally have all the desired effect with a true Christian, and the parties would be reconciled. The principles of these rules may be practised every where, and under all circumstances, though they are too much neglected by all. But how few try the method which Christ has expressly enjoined to all his disciples! In all our proceedings we should seek direction in prayer; we cannot too highly prize the promises of God. Wherever and whenever we meet in the name of Christ, we should consider him as present in the midst of us.Moreover, if thy brother shall trespass against thee,.... This is said to show, that as on the one hand, if any of those that believe in Christ, should commit a trespass against his fellow Christian, his sin is not to be connived at, for fear of offending him; for what Christ has before said, is not to be taken in such sense, as to prevent private reproof, or public censures, when there is occasion for them; so on the other hand, he is not to be despised and ill used, and treated in the same injurious manner; but gentle reproofs are to be made use of, for his good. This is spoken not to the apostles as such, but as believers in Christ; and concerns everyone that stands in the relation of a brother, or church member to each other, and only such; for they that are without, do not fall under their notice, nor are they obliged to take, nor can they take altogether, the same methods with them. This rule respects sins committed by one brother against another, either in word or deed; or such as are of a private nature, and which one only, or at least but few, are acquainted with: in such cases the advice is,

go and tell him his fault between thee, and him alone; do not wait for his coming to thee, as being the aggressor, to acknowledge his fault, testify his repentance, express his sorrow for his sin, and ask pardon: but go to him, and freely and faithfully lay his sin before him; but do not aggravate it, and reproach him with it, and bear hard on him for it, but gently rebuke and reprove him: let this be done in the most private manner; let none be present, nor any know of it, even the most intimate friend and acquaintance:

if he shall hear thee; patiently, take your reproof kindly, acknowledge his offence, declare his hearty sorrow for it, and desire it might be overlooked, and reconciliation made:

thou hast gained thy brother; recovered him from the error of his ways, restored him to his duty, and secured his friendship, and interest in his favour; nor should any mention be made of this ever after, either to him, or any other, or to the church.