Greek Key Terms:
Context: Ephesians 2:11-22 is Paul's most developed treatment of the Jew-Gentile reconciliation accomplished in Christ. Verses 12-19 — the section the TT foundations — trace the Gentile readers' transition from exclusion to full membership. Paul characterizes the former state with a five-fold exclusion: (1) without Christ (chōris Christou), (2) alienated from the commonwealth of Israel (apēllotriōmenoi tēs politeias tou Israēl), (3) strangers to the covenants of promise (xenoi tōn diathēkōn tēs epangelias), (4) having no hope (elpida mē echontes), and (5) without God in the world (atheoi en tō kosmō). The turning point comes at v. 13 ("But now in Christ Jesus") and v. 14 ("For he himself is our peace"). Christ's peace-making work has three distinct elements: He has made both groups one (2:14a); He has broken down the dividing wall of hostility (2:14b, to mesotoichon tou phragmou); and He has created in himself one new humanity (2:15, hena kainon anthrōpon). The climax in v. 19 uses two architectural-civic metaphors: Gentiles are no longer xenoi kai paroikoi ("strangers and sojourners") but sympolitai tōn hagiōn kai oikeioi tou theou ("fellow citizens with the saints and household members of God"). The passage then transitions to the temple metaphor of vv. 20-22, where Jewish and Gentile believers together form "a holy temple in the Lord."
OT Background: The "dividing wall" (mesotoichon) of v. 14 has a literal and a theological referent. Literally, the Jerusalem temple had a stone barrier (the soreg) separating the Court of the Gentiles from the inner courts, with inscriptions threatening death to any Gentile who crossed. Theologically, the Mosaic legal structure (especially the food laws, circumcision, and temple-access restrictions) functioned as a phragmos ("fence") distinguishing Israel from the nations. Paul's claim is that Christ has demolished both. The covenant substructure is the Shem-line trajectory: the "covenants of promise" (diathēkai tēs epangelias, v. 12) are the Abrahamic (Gen 12, 15, 17, 22), Davidic (2 Sam 7), and New (Jer 31) covenants — all of which Gentiles were previously "strangers" to. The "household of God" (oikeioi tou theou) language directly answers the Genesis-9 oracle's "tents of Shem" promise: Gen 9:27's ʾōhel ("tent") becomes, under the architectural expansion of post-exilic and Second Temple theology, the bayit ("house") of God, now realized in Christ as oikos tou theou. Paul's citation of Isa 57:19 at 2:17 ("peace to you who were far off and peace to those who were near") brings Isaianic Gentile-inclusion (Isa 56) forward into the argument.
Connections:
Christological Connection: On its own terms, Eph 2:12-19 claims that the separation between Jew and Gentile that structured redemptive history from Abraham to Pentecost has been terminated in Christ. The mesotoichon — the wall that protected Israel as the distinct covenant line — is gone. This is not Israel's rejection but Israel's enlargement: the cultivated olive of Rom 11 now includes grafted-in Gentiles; the house of prayer of Isa 56 is now the "household of God" (oikoi tou theou) occupied by believers from every nation; the tents of Shem (Gen 9:27) are now realized architecturally as one holy temple with Christ as cornerstone (2:20-22).
The three key terms — sympolitēs, oikeios, naos/oikos — together form a climactic answer to the Genesis-9 oracle. Sympolitēs ("fellow citizen") answers the political dimension: Gentiles are not resident aliens in a Jewish commonwealth but full citizens of the same politeia. Oikeios ("household member") answers the familial dimension: Gentiles are not guests in someone else's house but children in the same oikos, sharing the same father. Naos ("temple," 2:21) answers the cultic dimension: Jewish and Gentile believers together are the sanctuary where God dwells by His Spirit. Each term escalates the Genesis-9 vision — Japheth no longer merely dwells in Shem's tents; Japheth and Shem together constitute the new sanctuary.
Christ's peace-making work in 2:14-16 is the mechanism. The enmity (echthra) between Jew and Gentile — real and theologically grounded in the Mosaic separation — is killed in Christ's flesh (en tē sarki autou, 2:15). The cross, therefore, is not merely vertical (reconciling sinners to God) but horizontal (reconciling Jews and Gentiles to each other). The blood that was shed (2:13, "brought near by the blood of Christ") is the same blood that broke the wall (2:14-15). Shem and Japheth meet at the cross, and from that meeting-point a new humanity — hena kainon anthrōpon — is created, who together become oikos theou.
The escalation from OT to NT is architectural. Solomon's temple had Jewish courts and Gentile courts separated by a stone wall. Christ's temple has no wall — every believer, from every ethnic background, occupies the same sanctuary space in direct access to the Father (2:18, "through him we both have access in one Spirit to the Father"). The naos of 2:21 is not a building but a body — the gathered multi-ethnic church.
The already/not-yet: the already is every local church where Jewish and Gentile believers share baptism, Lord's Supper, and fellowship; every such gathering is a living Eph 2:19. The not-yet is Rev 21:22, where the new Jerusalem has no temple at all, "for its temple is the Lord God the Almighty and the Lamb," and the nations walk by its light — the consummate architectural realization of Shem's-tents-for-all-peoples. (For the full Gentile-inclusion trajectory, see TT 063 Gentile Inclusion.)
Connection Method(s): Promise-Fulfillment (primary) — Eph 2:12-19 announces the architectural/civic realization of the Genesis-9 Japheth-in-Shem's-tents oracle, the Abrahamic "all families blessed" promise (Gen 12:3), and the Isaianic "foreigners joining themselves" oracle (Isa 56:6-8); all three are named as fulfilled in Christ's peace-making work. Also Longitudinal Theme — a load-bearing stage in the canon-wide Gentile-inclusion motif from Gen 12:3 through Isa 56 to the throne-multitude of Rev 7:9. Also Redemptive-Historical Progression — Paul narrates a decisive stage-shift in redemptive history ("but now in Christ Jesus"), where the structural wall separating Jew and Gentile is demolished and a new humanity is inaugurated. Anti-default note: Not typology — there is no OT type being fulfilled with escalation in a single identifiable institution here. What Paul describes is the completion of the covenantal Gentile-inclusion promise in the peace-making work of Christ. The "dividing wall" is not a type of something that Christ fulfills; it is a historical reality that Christ abolishes.
Trajectory Table: 145 - Shem (Blessed Line of YHWH)