Paul advises the Ephesians that there are certain things Christians must put off and others they must put on. More specifically, he tells them (and us) to put on the Christian armor so we can be properly equipped to stand up to the assaults that inevitably come our way in this spiritually dangerous world.
Over recent years, there have been many television shows aimed at helping people get properly dressed. Sometimes the premise revolves around experts helping people to pick the right outfit for a wedding. At other times, someone with a woefully poor fashion sense receives a total makeover with the help of fashion gurus and some serious spending. In a similar way, Christianity helps people become properly dressed, although not in the typical sense.
Paul advises the Ephesians that there are certain things Christians must put off and others they must put on. More specifically, he tells them (and us) to put on the Christian armor so we can be properly equipped to stand up to the assaults that inevitably come our way in this spiritually dangerous world.
God’s Armor
According to the Bible, life is not a picnic but a battle, an armed struggle against a powerful adversary. To engage in that battle properly, we need a spiritual makeover in which our flimsy, inadequate natural attire is replaced by suitable armor and weaponry. So Paul concludes his magnificent, gospel-saturated letter to the Ephesians with a final charge to be prepared to engage with the battle of life in the right way, dressed in the armor of God.
Many people assume that, as Wikipedia puts it,
the various pieces (the belt of truth, the breastplate of righteousness, the shoes of the gospel of peace, the shield of faith, the helmet of salvation, and the sword of the Spirit) are correlated to what Paul would have witnessed firsthand as the arms and armor of Roman legionaries during his life in the Roman Empire.
This assumption, however, misses the fact that each of the pieces of armor has a rich background in the Old Testament, where they describe God’s armor — the armor that God himself dons to rescue his people. The Old Testament, not the Roman legionary, provided Paul with his inspiration — and if we miss this background, we may misinterpret and misapply the various pieces of the armor.
Breastplate and Helmet
The most obvious examples are “the breastplate of righteousness” and “the helmet of salvation” (Ephesians 6:14, 17), both of which are drawn directly from Isaiah 59:17. There the prophet says of God, “He put on righteousness as a breastplate, and a helmet of salvation on his head; he put on garments of vengeance for clothing, and wrapped himself in zeal as a cloak.” In the preceding chapters, Isaiah describes God’s promise to deal with the physical enemies of his people, especially Babylon. But now the prophet describes the divine warrior coming to deal with the far greater and more dangerous enemy of their souls: sin.
God’s people have no righteousness of their own to bring; their best righteousness, apart from divine help, is nothing more than filthy garments (Isaiah 64:6). If the Lord were to deal with his people according to their own deeds, there would be nothing to anticipate but fearful judgment. But Isaiah declares that the divine warrior would not come as a wrathful judge; instead, he would come as their Redeemer to bring them salvation.
Ready Feet
Similarly, Paul’s image of “feet readied with the gospel of peace” (Ephesians 6:15, my translation) does not stem from observing Roman sandals; rather, the picture draws directly on Isaiah 52:7: “How beautiful upon the mountains are the feet of him who brings good news, who publishes peace, who brings good news of happiness, who publishes salvation, who says to Zion, ‘Your God reigns.’” Ephesians 6 and Isaiah 52 (together with Nahum 1) are the only passages in the Bible where the words feet, good news, and peace occur together.
