Ephesians 6:16

Above all--rather, "Over all"; so as to cover all that has been put on before. Three integuments are specified, the breastplate, girdle, and shoes; two defenses, the helmet and shield; and two offensive weapons, the sword and the spear (prayer). ALFORD translates, "Besides all," as the Greek is translated, Luk 3:20. But if it meant this, it would have come last in the list (compare Col 3:14). shield--the large oblong oval door-like shield of the Romans, four feet long by two and a half feet broad; not the small round buckler. ye shall be able--not merely, "ye may." The shield of faith will certainly intercept, and so "quench, all the fiery darts" (an image from the ancient fire-darts, formed of cane, with tow and combustibles ignited on the head of the shaft, so as to set fire to woodwork, tents, &c.). of the wicked--rather "of the EVIL ONE." Faith conquers him (Pe1 5:9), and his darts of temptation to wrath, lust, revenge, despair, &c. It overcomes the world (Jo1 5:4), and so the prince of the world (Jo1 5:18).

— Jamieson-Fausset-Brown Commentary (public domain)