Ephesians 3 is focused on the mystery of Christ and how it was revealed to Paul by divine revelation. Paul writes about the unity of Jews and Gentiles in Christ and how both groups can now approach God through faith in Jesus. He also speaks to the Gentiles specifically and acknowledges that they are now part of the same body as the Jews, thanks to Jesus breaking down the barrier between them. Furthermore, Paul mentions his role as a prisoner for Christ and how he prays for everyone to have a deeper understanding of God's love in order to be filled with that love completely.