Ephesians 3:9

For I do not want you, brothers, to be uninformed of this mystery—so that you will not be wise in your own estimation—that a partial hardening has happened to Israel until the fullness of the Gentiles has come in;

Now to Him who is able to strengthen you according to my gospel and the preaching of Jesus Christ, according to the revelation of the mystery which has been kept secret for long ages past,

if indeed you heard of the stewardship of God’s grace which was given to me for you;

that by revelation there was made known to me the mystery, as I wrote before in brief.

About which, when you read you can understand my insight into the mystery of Christ,