Ephesians 3:9-11

and to make plain [to everyone] the plan of the mystery [regarding the uniting of believing Jews and Gentiles into one body] which [until now] was kept hidden through the ages in [the mind of] God who created all things. So now through the church the multifaceted wisdom of God [in all its countless aspects] might now be made known [revealing the mystery] to the [angelic] rulers and authorities in the heavenly places. This is in accordance with [the terms of] the eternal purpose which He carried out in Christ Jesus our Lord