en_tn_condensed/eph/03/03.md

The mystery was made known to me by revelation

"I learned about the mystery by revelation" or "God revealed the mystery to me". Paul refers to the church as a "mystery". The role of the church in the plans of God was once not known but God has now revealed it. Part of this mystery involves the Gentiles having equal standing with the Jews in the plans of God.

The mystery

"God's secret plan" or "The hidden truth"

as I have written briefly

Paul refers to another letter he had written to these people.