Ephesians 3:3-6

3and that by [divine] revelation the mystery was made known to me, as I have already written in brief.

4By referring to this, when you read it you can understand my insight into the mystery of Christ,

5which in other generations was not disclosed to mankind, as it has now been revealed to His holy apostles and prophets by the [Holy] Spirit;

6[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].