Does Paul's teaching in Ephesians 3 concerning "mystery" conflict with the Reformed confessions' view of the unity of the covenant of grace? The purpose of the author is to survey the meaning of the word "musterion" in secular and Jewish literature, including the Dead Sea Scrolls, and the writings of the Apostle Paul.
This is a book about the unity of the church of Christ, and chapter 1 is a short theology of the unity of the church. This unity is a demonstration of God’s purpose of cosmic unity (Colossians 1:15-20). The church further displays the unity and uniqueness of God; the unity of the church reflects the glory of God.