For I tell you that Christ became a servant to the circumcised to show God’s truthfulness, in order to confirm the promises given to the patriarchs (Rom 15:8)

Paul summarizes the first advent of Messiah as service to the Jews in order to confirm the hope of Israel. The everlasting covenant is the source of hermeneutical truth. The further you veer from it, the further you drift into delusion. - John P. Harringan