This is the reason that I Paul am a prisoner for Christ Jesus for the sake of you Gentiles—
References for Ephesians 3:1
for surely you have already heard of the commission of God's grace that was given me for you,
and how the mystery was made known to me by revelation, as I wrote above in a few words,
a reading of which will enable you to perceive my understanding of the mystery of Christ.
In former generations this mystery was not made known to humankind, as it has now been revealed to his holy apostles and prophets by the Spirit:
References for Ephesians 3:5
that is, the Gentiles have become fellow heirs, members of the same body, and sharers in the promise in Christ Jesus through the gospel.