Colossians 1:26-28

26the mystery that has been kept hidden for ages and generations, but is now disclosed to the Lord’s people.

27To them God has chosen to make known among the Gentiles the glorious riches of this mystery, which is Christ in you, the hope of glory. 28He is the one we proclaim, admonishing and teaching everyone with all wisdom, so that we may present everyone fully mature in Christ.