Note: A key feature of this structure is that “the strength of [the Lord’s] might” (Eph. 6:10) is explained for us by the itemised pieces of armour in Ephesians 6:14-20. We are not left to wonder exactly what we might expect from the Lord’s strength of might, the apostle explains for us whence the Lord’s strength comes. This chiastic association of the Lord’s strength of might with all the itemised weapons is reinforced by further exposition. “In the strength of his might” (Eph. 6:10) is quoted from Ps. 71:16 and, when we examine that Psalm and its context, we find all the itemised weapons referenced by David in some fashion.  Eph 6 and Psa 71 .

A 10  “Finally, be strong in the Lord and in the strength of his might.

B 11  “Put on the whole armour of God, that you may be able to stand against the schemes of the devil”

C 12 “For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places” 

B’ 13 “Therefore take up the whole armour of God, that you may be able to withstand in the evil day, and having done all, to stand firm”

A’. 14-20 “Stand therefore, having fastened on the belt of truth, and having put on the breastplate of righteousness, and, as shoes for your feet, having put on the readiness given by the gospel of peace. In all circumstances take up the shield of faith, with which you can extinguish all the flaming darts of the evil one; and take the helmet of salvation, and the sword of the Spirit, which is the word of God, praying at all times in the Spirit, with all prayer and supplication. To that end keep alert with all perseverance, making supplication for all the saints, and also for me, that words may be given to me in opening my mouth boldly to proclaim the mystery of the gospel, for which I am an ambassador in chains, that I may declare it boldly, as I ought to speak”.