Paul concludes his letter by commanding the Ephesians to pray at all times, being alert not only for their own needs but also for all the saints. He also tells them that he is sending Tychicus to them so that they might know more about Paul's affairs, and so that they might be encouraged. Just as he began the letter, and as he described in full throughout, he declares grace and peace to them with incorruptible love through the Lord Jesus Christ.

Paul finishes describing the final pieces of God's armor that the church is to be equipped with: the boots, the shield, the helmet, and the sword. First, the boots are equipped so that the church might herald the gospel. Faith is the church's shield, used to dispose of the enemy's evil devices. The salvation wrought by Christ is to adorn the head of his people as a helmet, again protecting them from the enemy. Lastly, the Word of God is to be equipped as a sword whose sole purpose is to enlighten the hearts of God's people with the truth so that they might ward off the lies of the enemy. This armor heralds God's glorious gospel while simultaneously defending it against God's enemies—so stand firm!

Having called his readers to stand firm, Paul here begins to explain with what they are to stand firm with, namely, the armor of God. It is not by accident that the first piece named is the belt of truth and subsequently the breastplate of righteousness, for adherence to the truth of Christ necessarily leads to righteousness, as Paul has previously explained. Furthermore, these pieces of armor were first worn by Christ, who is himself the truth and the divine warrior. In this way, Paul calls his readers to put on Christlikeness.