“And even they, if they do not continue in their unbelief, will be grafted in, for God has the power to graft them in again” (v23). The Roman church was mixed, Jewish and Gentile, so Paul addressed many questions about Jews and Gentiles and salvation (see ch 4). While it looked at the time that only a few Jews were following the Messiah, Paul assured the church that there were others, like him, who believed (v1-4). Further, Paul looked forward to a day when even more Jews would be “grafted in” – included in God’s family by faith in Jesus.
“For God has consigned all to disobedience, that he may have mercy on all” (v32). God’s mercy poured out in Christ is big enough for us all, Jew and Gentile together.