A Message from Father Ben Nwosu

What does Matthew 18:15–20 mean?

Matthew 18:15–20 describes a three-stage process for addressing sin within the church community: private correction, witnesses, and ecclesial judgment, culminating in the binding and loosing authority granted to the gathered body. The passage emphasizes restorative discipline grounded in Christ's presence among his disciples and their collective authority to render binding decisions ratified in heaven.

Key Insight

Jesus doesn't allow us to publicly shame a brother—he demands we try to win him back privately first, through a measured process of correction that moves from mercy to community witness to binding authority

Commentary

Matthew 18:15 — The First Step: Private Correction The passage opens with a conditional that assumes the reality of sin within the community: "If your brother sins against you." The word "brother" (ἀδελφός, adelphos) is deliberately chosen — this is not a stranger but a fellow member of the covenant community, one bound by the same baptismal and discipleship ties. The instruction to "go and show him his fault between you and him alone" is remarkable for what it forbids as much as what it commands. Jesus rules out gossip, public shaming, and passive avoidance. The verb "show" (ἐλέγχω, elenchō) carries the sense of bringing something hidden into the light — the goal is clarity, not condemnation. The purpose is explicitly restorative: "you have gained back your brother." The Greek ekerdēsas ("gained") is the same verb Paul uses in 1 Corinthians 9:19–22 for winning souls — this is missionary language applied to the interior life of the community. Sin is treated here not merely as a personal transgression but as a rupture in communion that demands repair.

Matthew 18:16 — The Second Step: Witnesses If private conversation fails, the offending brother is not simply denounced but accorded a second chance, now accompanied by "one or two more." Jesus explicitly cites Deuteronomy 19:15, the Torah's requirement of multiple witnesses in judicial proceedings — a citation that signals the gravity and juridical seriousness of what is being established. The Church is not operating on mere social convention; she is fulfilling and elevating Mosaic law. The witnesses serve two purposes: they confirm the facts, and they expand the circle of accountability without yet making the matter fully public. This stage models the Church's own tradition of canonical process — gradual, proportionate, and always oriented toward repentance.

Matthew 18:17 — The Third Step: The Church The third stage introduces the decisive word: "tell it to the ekklēsia" — the assembly, the Church. This is one of only three times Matthew uses the word ekklēsia (cf. 16:18), and here it is clearly a visible, authoritative, structured body capable of rendering binding judgments. The instruction "let him be to you as a Gentile or a tax collector" is often misread as cold exclusion. But in Matthew's Gospel, Jesus eats with tax collectors (9:10–11) and reaches out to Gentiles (15:21–28) — this is a pastoral reassignment of relationship, not permanent rejection, but a recognition that the offender has voluntarily placed himself outside the covenant community and must be approached again as one who still needs conversion.

Matthew 18:18 — The Binding and Loosing Here Jesus grants to the gathered community the same authority he granted to Peter alone in 16:19: the power to bind and loose. In rabbinic usage, "binding and loosing" referred to authoritative halakhic decisions — declaring what is permitted or forbidden in the life of the community. In this context, it applies directly to the discipline just described: the Church's judgments about sin, exclusion, and restoration are ratified in heaven. The passive voice ("will have been bound/loosed in heaven") suggests that the Church does not create the judgment but recognizes and applies a divine reality. Catholic tradition reads this as the foundation of both ecclesiastical jurisdiction and the sacrament of Penance.

Verses 19–20 — Prayer, Agreement, and Presence The passage closes by grounding all ecclesial authority in the living presence of Christ himself. The "agreement" of two or three is not mere majority rule but symphōnia — a musical metaphor suggesting harmony of will with the Father's will. The promise "there I am in the middle of them" (ἐν μέσῳ αὐτῶν) recalls the Shekinah presence dwelling among Israel (Exodus 25:8; cf. Ezekiel 37:27) — Christ himself is the new Temple, the new locus of divine presence, constituted wherever disciples gather in his name. This transforms every act of fraternal correction and communal discernment into a liturgical act, a participation in the divine life.

Catholic Commentary

Catholic tradition reads Matthew 18:15–20 as one of the scriptural cornerstones of ecclesiology, sacramental theology, and moral life simultaneously.

The Church as Divinely Authorized Community: The Second Vatican Council's Lumen Gentium (§8) teaches that the Church of Christ "subsists in" the Catholic Church, which is not a voluntary human association but a society endowed with Christ's own authority. Verse 17's appeal to the ekklēsia and verse 18's binding and loosing language are central to this claim. 

Fr. Ben