In our study today in Ephesians 3:6-8, Paul continues his explanation that believing Gentiles and Jews are now in the same body and partakers of the same promise, and he expresses his gratitude that God still chose to use him who was formerly a blasphemer to preach it.
Verse 6: That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel:
This is the mystery! Jew and Gentile in one body.
No where in the Bible was this event foretold, i.e., Hebrew Scriptures. This But Now (Ephesians 2:13) period in which we live was never spoken of until Paul.