Paul writes to the Ephesians about the mystery of God's plan that has now been revealed through Christ. This mystery is that Gentiles are fellow heirs with Israel through their shared faith in Christ. Paul asks that the Ephesians may be strengthened in their inner being through God's Spirit so that Christ may dwell in their hearts through faith. He prays that they would understand the immense love of Christ and be filled with all the fullness of God.