For this reason I, Paul, the prisoner of Christ Jesus for the sake of you Gentiles, pray to God.
Surely you have heard that God in his grace has given me this work to do for your good.
God revealed his secret plan and made it known to me. (I have written briefly about this,
and if you will read what I have written, you can learn about my understanding of the secret of Christ.) 1
References for Ephesians 3:4
3.4-6 Col 1.26, 27.
In past times human beings were not told this secret, but God has revealed it now by the Spirit to his holy apostles and prophets.
The secret is that by means of the gospel the Gentiles have a part with the Jews in God's blessings; they are members of the same body and share in the promise that God made through Christ Jesus.