Ephesians 3:2-3, 5-6

assuming that you have heard of the stewardship of God’s grace that was entrusted to me [to share with you] for your benefit; and that by [divine] revelation the mystery was made known to me, as I have already written in brief. [Eph 1:9]

which in other generations was not disclosed to mankind, as it has now been revealed to His holy apostles and prophets by the [Holy] Spirit; [it is this:] that the Gentiles are now joint heirs [with the Jews] and members of the same body, and joint partakers [sharing] in the [same divine] promise in Christ Jesus through [their faith in] the good news [of salvation].