Context: Jeremiah 31:33-34 stands at the structural climax of the Book of Consolation (Jer 30-33), Jeremiah's concentrated oracles of restoration amid the oracles of judgment that dominate the rest of his prophecy. The new-covenant passage (Jer 31:31-34) is the OT's most explicit, most comprehensive, and most frequently NT-cited announcement of the eschatological covenant that will supersede the Mosaic covenant: "Behold, the days are coming, declares the LORD, when I will make a new covenant (בְּרִית חֲדָשָׁה, bərît ḥădāšâ) with the house of Israel and with the house of Judah, not like the covenant that I made with their fathers on the day when I took them by the hand to bring them out of the land of Egypt, my covenant that they broke, though I was their husband, declares the LORD. But this is the covenant that I will make with the house of Israel after those days, declares the LORD: I will put my law (tôrâ) within them (בְּקִרְבָּם, bəqirbām), and I will write it on their hearts (עַל־לִבָּם, ʿal-libbām). And I will be their God, and they shall be my people. And no longer shall each one teach his neighbor and each his brother, saying, 'Know the LORD,' for they shall all know me (כֻּלָּם יֵדְעוּ אוֹתִי, kullām yēdəʿû ʾôtî), from the least of them to the greatest, declares the LORD. For I will forgive their iniquity, and I will remember their sin no more" (31:31-34). Within the Priestly Teaching trajectory, vv. 33-34 are the decisive OT-canonical hinge. The entire post-Sinai priestly-teaching mechanism — priests as tôrâ-transmitters (Lev 10:10-11; Deut 17:8-13; Deut 33:10), prophets as indicters of teaching-failure (Jer 18:18; Hos 4:6; Mal 2:7-8), Ezra and the Levites as ideal exemplars (Neh 8:1-8) — is here prophetically declared provisional, superseded by a covenant in which God Himself writes the tôrâ on every heart and in which all God's people "know" Him without the external mediation of a priestly teacher. This is the OT's own declaration that the priestly teaching office has a terminal horizon: not its abolition as a content-source (the tôrâ is preserved, now internalized), but its abolition as a required human mediation-structure.
Hebrew Key Terms:
OT-to-OT Development: Jer 31:33-34 stands at the apex of an intra-OT development of covenant-internalization anticipations:
Together these texts establish that Jer 31:33-34 is not an isolated promise but the apex of an OT-internal development: Moses anticipated heart-circumcision; Ezekiel promised new-heart-and-Spirit; Joel promised Spirit-for-all; Jeremiah names the mechanism (tôrâ internalized, teaching-mediation abolished, universal knowing).
Connections:
Christological Connection: Jeremiah 31:33-34 is arguably the most christologically weighty prophetic text for the Priestly Teaching trajectory — it functions as the OT's own self-announcement that its teaching mechanism has a terminal horizon in a covenant whose mediator is still (at the Jeremiah-time) unidentified. Christ is that mediator.
(1) Christ as the Mediator of the New Covenant: The NT repeatedly identifies Christ as the One whose blood inaugurates the covenant Jeremiah promised. At the Last Supper, Jesus declares: "This cup is the new covenant in my blood" (Luke 22:20; 1 Cor 11:25) — an unmistakable allusion to Jer 31:31 (the new covenant) combined with Exod 24:8 (blood-of-the-covenant). Hebrews makes the identification comprehensive: Christ is "the mediator of a new covenant" (Heb 9:15; 12:24). The priestly-teaching trajectory's OT terminus (Jer 31:33-34) is therefore fulfilled only in Christ's priestly work: His sacrificial death establishes the covenant whose interior tôrâ-writing enables the promised universal knowing.
(2) The Spirit Executes the Interior Writing: Jer 31:33's "I will put my tôrâ within them, and I will write it on their hearts" is pneumatologically executed. Paul makes this explicit in 2 Cor 3:3-6: the Corinthians are "a letter from Christ... written not with ink but with the Spirit of the living God, not on tablets of stone but on tablets of human hearts" (3:3); Paul and the apostles are "ministers of a new covenant, not of the letter but of the Spirit" (3:6). The parallel Ezek 36:26-27 promise ("I will put my Spirit within you, and cause you to walk in my statutes") is the Spirit-side complement to the Jer 31 tôrâ-side: the same reality viewed from two angles. John 14:26's Spirit-as-Teacher is the ongoing mechanism by which the Jer 31 internalization takes effect in each believer's life.
(3) The Universal-Knowing Clause Inaugurated and Awaiting Consummation: Jer 31:34's "they shall all know me, from the least to the greatest" is cited in Heb 8:11 as now-being-inaugurated in the new covenant. Hebrews 8 quotes Jer 31:31-34 in full — the single longest OT quotation in the NT — and argues from it that the old covenant is obsolete (Heb 8:13). But within the new covenant, the knowing-of-God is inaugurated-yet-not-consummated. Believers now know God truly but partially (1 Cor 13:12: "now we see in a mirror dimly, but then face to face; now I know in part; then I shall know fully"); the full face-to-face vision (Rev 22:4) awaits the new creation. The already/not-yet structure is built into the promise itself: "they shall all know me" is universally predicated of new-covenant members, but the mode of that knowing escalates from partial-present to complete-consummated.
(4) The Priestly Teaching Trajectory's Canonical Hinge: Jer 31:33-34 is where the priestly teaching trajectory's direction-of-travel decisively reverses. Before Jer 31:33-34: priests teach tôrâ externally to Israel (Lev 10; Deut 17; Deut 33; Neh 8). After Jer 31:33-34 (in its fulfillment-horizon): God Himself writes tôrâ internally on every covenant member's heart, abolishing the necessity of external priestly mediation while preserving the tôrâ-content and the relational-knowing that was the teaching's ultimate goal. The priestly teaching office is not abolished in content but transformed in mechanism: Christ teaches (Matt 7:29; Luke 24:27), the Spirit teaches (John 14:26), the community teaches one another (Col 3:16), but all of this is the outworking of the Jer 31:33 interior writing — not its substitute.
Already/not-yet: Already — the new covenant is inaugurated in Christ's blood (Luke 22:20); the Spirit writes tôrâ on believers' hearts (2 Cor 3:3); the Spirit teaches internally (John 14:26; 1 John 2:27); Heb 8:8-12 declares the prophecy as now-in-force. Not-yet — believers still need teachers in the present age (Eph 4:11; Col 3:16; Heb 5:12); the "all know me, from the least to the greatest" awaits the new creation (Heb 8:11 consummation / Rev 22:4 face-to-face vision). The Jer 31 promise is both the trajectory's canonical hinge-point and the hermeneutical lens through which the remainder of the trajectory — Christ's teaching, the Spirit's teaching, the church's teaching, and the eschatological consummation — must be read.
Connection Method(s): Promise-Fulfillment (primary) — Jer 31:33-34 is the explicit verbal divine commitment that Christ's blood inaugurates (Luke 22:20; 1 Cor 11:25), the Spirit executes (John 14:26; 2 Cor 3:3-6), and Hebrews 8:8-12 quotes in full as now-being-fulfilled. The promise-fulfillment relationship is as verbally explicit as any in the canon. Also Longitudinal Theme — Jer 31:33-34 is the canonical hinge-node of the divine-instruction theme, the prophetic declaration that the external priestly-teaching mechanism has a terminal horizon in universal internal knowing. Also Typology (Institutional, Backward-Looking — secondary) — the Mosaic-priestly teaching institution (Lev 10:10-11; Deut 33:10) functions backward-lookingly as a type of the new-covenant internal teaching that Christ's Spirit effects; the typological relation is articulated from the NT vantage point (Heb 8:8-13's argument that the old covenant is obsolete against the Jer 31 standard).
Trajectory Table: 123 - Priestly Teaching (Torah Instruction)