Context: Leviticus 19 is the center of the Holiness Code (Lev 17-26), opening with its governing charge: "Be holy because I, the LORD your God, am holy" (Lev 19:2). The chapter translates the Decalogue into the texture of Israel's daily life — fields, wages, courts, neighbors — and punctuates each unit with the covenant signature "I am the LORD." Verses 17-18 form the climax of a unit on dealing with a brother who has wronged you: "You must not harbor hatred against your brother in your heart. Directly rebuke your neighbor, so that you will not incur guilt on account of him" (Lev 19:17), then the target verse: "Do not seek revenge or bear a grudge against any of your people, but love your neighbor as yourself. I am the LORD." The structure matters: the Torah does not merely suppress the outward act of revenge (nāqam); it forbids the inward economy that funds it — hidden heart-hatred and grudge-keeping (nāṭar, literally to "keep" or "tend" a grievance the way a keeper tends a vineyard, Song 1:6) — and it replaces the whole vengeance-system with a positive command: love your neighbor as yourself. Honest rebuke is commanded precisely so that grievances are dealt with openly rather than nursed into blood-feud. This is the law's own seed of the kingdom ethic: centuries before the Sermon on the Mount, the Torah itself declares that the Lamech-song — wound tallied, grudge kept, repayment amplified — is forbidden to the holy people, because their God, not their rage, is the guarantor of justice. Holiness here is imitation of the LORD, who Himself "will not harbor His anger forever" (Ps 103:9, the same verb nāṭar).
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Christological Connection: In its own context Lev 19:18 establishes that non-vengeance is not a New Testament innovation but Torah bedrock. The holy God claims His people's grievances as His own jurisdiction: revenge and grudge-keeping are forbidden because "I am the LORD" — the covenant Lord who both guarantees justice (so the wronged need not seize it) and models mercy (He does not harbor His anger, Ps 103:9). And the law is not satisfied with restraint; it commands the positive opposite — love of neighbor as oneself — making the inner life of the Israelite, not merely his courtroom conduct, the arena of holiness. Lamech's song is thus already illegal at Sinai: the kept grudge, the tallied wound, the self-administered repayment are all named and barred.
Jesus does not replace this command; He enthrones it and exposes its true reach. He names it the second greatest commandment, on which with the Shema "all the Law and the Prophets" hang (Matt 22:39). In the Sermon on the Mount He quotes it against the tradition that had quietly appended "and hate your enemy," restoring and radicalizing its scope: "love your enemies and pray for those who persecute you" (Matt 5:43-44) — the move Lev 19:34 had already begun by extending "as yourself" to the foreigner. When the lawyer seeks a boundary ("Who is my neighbor?"), Jesus answers with the Samaritan and removes the boundary altogether (Luke 10:29-37). The escalation runs from command to embodiment: the One who taught the law kept it where it is hardest — loving His enemies to the point of dying for them and interceding for His executioners (Luke 23:34; Rom 5:8, 10). The apostles then hand the command to the church as its summary ethic: "the entire law is fulfilled in a single decree: 'Love your neighbor as yourself'" (Gal 5:14; cf. Rom 13:9; Jas 2:8).
Already/not-yet: Already, the command's deepest logic — be like your covenant Lord — is now grounded in the gospel rather than bare imitation: "forgiving one another, as God in Christ forgave you. Be imitators of God, therefore, as beloved children" (Eph 4:32-5:1); the Spirit writes Lev 19:18 on hearts that once kept Lamech's ledger. Not yet, the renunciation of grudge and revenge still leans on the certainty that the LORD who said "I am the LORD" will execute perfect justice at the end (Rom 12:19; Rev 19:2) — love can absorb wrongs now because no wrong will finally go unreckoned.
Connection Method(s): Redemptive-Historical Progression (primary) — Lev 19:18 is the Torah-stage of the canon's vengeance-to-forgiveness trajectory: after the Noahic cap on bloodshed and alongside the judicial lex talionis, the law itself withdraws vengeance from the private heart and commands neighbor-love, the seed that grows through the prophets and wisdom into the kingdom ethic Jesus announces and the apostles universalize. Also Longitudinal Theme — the verse is a keystone of the canon-wide neighbor-love / non-retaliation motif (Ex 23:4-5 → Lev 19:18, 34 → Prov 20:22; 25:21-22 → Matt 5:43-44; 22:39 → Rom 13:9; Gal 5:14; Jas 2:8), the thread by which the NT itself summarizes the whole law. Also Analogy — as Israel was to renounce revenge and love because "I am the LORD" their holy covenant God, so the church renounces revenge and loves because of what that same LORD has now done in Christ (Eph 4:32-5:2): the ground escalates from covenant identity to accomplished redemption. ANTI-DEFAULT CHECK: this is not Typology — a standing moral command is not a historical prefigurement with escalation; nothing here is superseded or reversed, so Contrast is also wrong. The command is fulfilled by being kept, deepened, and re-grounded, which is precisely Redemptive-Historical Progression carried by a Longitudinal Theme.
Trajectory Table: 092 - Lamech's Song (Vengeance vs Forgiveness)
Related: ATN — Leviticus 19:18 (Love Your Neighbor)