‘The great mystery of Ephesians 6 is that God bestows his own armor on his people. The medium of the great gift is first Jesus Christ, God’s Champion, who is depicted by the OT and the NT as clothed in the same armor as YHWH, wielding his ferocious long sword against his people’s enemies (Is 11:4–5; 59:16–17; Rev 1:13–16; 19:11–15). But Ephesians takes this one step farther by arguing that, since the Christian is mystically “in Christ,” this armor is bestowed on everyone baptized into him.’
Winger, T. M. (2015). Ephesians. (D. O. Wenthe & C. P. Giese, Eds.) (p. 748). Saint Louis, MO: Concordia Publishing House.
The order to “stand” that pervades Ephesians 6:11–14 does not imply that Christian soldiers are given a special tactic by which they are able to defend themselves, but rather teaches them that the battle is the Lord’s. They are to stand back and watch him win the victory for them (cf. הִֽתְיַצְב֗וּ, “stand firm!” in Ex 14:13 in the context of Ex 14:13–14, 30–31; and הִתְיַצְּב֣וּ עִמְד֡וּ, “stand firm! stand!” in 2 Chr 20:17).
Winger, T. M. (2015). Ephesians. (D. O. Wenthe & C. P. Giese, Eds.) (p. 703). Saint Louis, MO: Concordia Publishing House.