7. By the word of truth, by the power of God—rather, "In … in," &c. As to "the word of truth" (compare 2Co 4:2; Col 1:5), and "the (miraculous) power of God" (2Co 4:7); 1Co 2:4, "in demonstration of the Spirit and of power."
by the armour—Greek, "through" or "by means of the armor." "Righteousness," which is the breastplate alone in Eph 6:13-17, here is made the whole Christian panoply (compare 2Co 10:4).
on … right … and … left—that is, guarding on every side.