Jamieson, Fausset & Brown

By the word of truth, by the power of God--rather, "IN . . . in," &c. As to "the word of truth" (compare Co2 4:2; Col 1:5), and "the (miraculous) power of God" (Co2 4:7); Co1 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 Co2 10:4). on . . . right . . . and . . . left--that is, guarding on every side.