Ephesians 3:2-5

2assuming that you have heard of the stewardship of God’s grace that was entrusted to me [to share with you] for your benefit;

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;