Paul ends his letter with a powerful call to battle that draws together themes and ideas important to the letter as a whole. He begins by announcing the overarching theme of the conclusion, offered in the tone of a commander’s battle cry: “Finally, be strong in the Lord and in the strength of his might” (Eph. 6:10, ESV). The rest of the passage (Ephesians 6:11–20) illustrates and unpacks this large theme.Read again Ephesians 6:10–20. How do you see the reality of the great controversy, which involves literal supernatural powers, as central to Paul’s point? Why is keeping this crucial truth before us so important in our own daily walk with God?Paul identifies Christ as the Source of believers’ strength with his phrase “in the Lord and in the power of His might” (Eph. 6:10, NKJV) since “Lord” refers to Christ, as is consistently the case in Ephesians (Eph. 2:21; Eph. 4:1, 17; Eph. 5:8; Eph. 6:1, 21). “The Church’s strength lies in the almightiness of her risen Lord, the Captain of her warfare.”—G. G. Findlay, The Epistle to the Ephesians (New York: Ray Long