ISB ~ Romans 11 v25

mystery:The plan of worldwide salvation hidden in the Scriptures (16:25-26) but now made known through the Spirit (Eph 3:4-6).

part of Israel:Those in Israel who are unresponsive to the gospel (11:7). Only some in Israel are hardened in this way, since a remnant of ethnic Israelites has come to believe in Jesus as the Messiah (11:5). Paul himself is among this believing remnant (11:1).

the full number of the Gentiles:The many people and nations of the world who will come to faith in Christ. Paul played a monumental role in launching the Church’s pursuit of this missionary goal (1:5; 11:13). It is not specified when the conversion of the Gentiles will reach the point of fullness determined by God (CCC 674).