Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one, And to thy seed, (18) which is (l) Christ.
(18) He puts forth the sum of the seventh argument, that is, that both the Jews and the Gentiles grow together in one body of the seed of Abraham, in Christ alone, so that all are one in Christ, as it is afterward declared in (Galatians 3:28).
(l) Paul does not speak of Christ's person, but of two peoples, who grew together in one, in Christ.