Paul’s teaching about the Spirit in the letter to the Romans opens the boundaries of who is included in the people of God, so that Jew and Gentile might glorify God together. The Holy Spirit is the Spirit of unity (15:5) and adoption (8:15) , that marks out the new covenant people of God. From chapter 1 through to the end of 16 “the burden of this letter....has to do with the Gentiles as full and equal recipients in the covenant promises made to Israel- and that without excluding Israel”(Fee, GEP). Paul opposes, on the one hand, Jews who falsely rely on the observance of Law and circumcision (2:17) , and on the other, Gentiles who boast over the Jews rejection by God.(10:18) Paul’s argues for a united people of God, Jew and Gentile, with one God(3:27-30), one Lord(10:12) , one family faith (4:11-12, 10:12-13), who “with one heart and mouth may glorify the God and Father of our Lord Jesus Christ” (15:6). In Paul’s argument, the Spirit, along with faith, replaces Law observance and circumcision(2:28-29) as the boundary markers of the new covenant people of God. The Spirit is the one who circumcises hearts to make true Jews, and it is the Spirit who empowers Paul’s gospel to sanctify the Gentiles (15:15-19). The Spirit unites believers to Christ , and those without the Spirit do not belong to Christ. In 8:12-30 Paul transfers terms of covenant status, based in the narratives of Israel’s exodus, from Israel to Jesus, and subsequently to describe those with the Spirit of Christ. The Spirit makes us share in Jesus prayer of sonship to the Father and confirms us as co-heirs with Christ sharing in his glory(8:15). “Those led by the Spirit of God are sons of God” chosen to be freed from slavery, waiting to inherit the entire world, as promised to Abraham in 4:13. While the language is from Roman adoption practices, “the idea of divine sonship links back into Israel’s sense of election as God’s son” (Dunn) The use of these terms for those with the Spirit is strong enough to generate the questions about the continuing role of Israel in chapters 9-11, to whom belong the adoption as sons, the law and the promises and the divine glory. Thompson, Tobin (and Paul ) are quick to point out that Jews are not therefore excluded, but welcomed on the same basis
“confession of God as Father highlights God’s mercy to Israel as well as to the Gentiles in adopting them into one family who, as descendants of Abraham, inherit together in Jesus Christ ”(M.M. Thompson)
Recognition of this unity in the Spirit, along with the death of Christ for both Jew and Gentile forms the basis for Paul’s exhortation to both weak and strong in chapter 14, so that each may welcome the other, to the praise of God.(15:7-9) As part of Paul’s goal of seeing Jew and Gentile united in praise of God through Jesus Christ, the Spirit replaces the Law as a boundary marker of the people of God.
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