Ephesians 6:13,14

Wherefore On this account, because the prize for which you contend is of such great value, and the enemies that oppose you are so subtle, powerful, and malicious, and will assuredly exert themselves to the utmost to effect your destruction, again let me say, Take unto you the whole armour of God, that ye may be able to withstand These dangerous enemies; in the evil day The day of temptation and trial. The war, we may observe, is perpetual: but the fight is one day less, and another more violent, and may be longer or shorter, admitting of numberless varieties; and having done all Having exerted yourselves to the utmost, and used the grace conferred upon you, and the means and advantages vouchsafed you, according to the will of God, which indeed it will be absolutely necessary for you to do; or, having gone through all your conflicts, and accomplished your warfare; to stand Victorious and with joy, before the Son of man. Stand therefore, having your loins girt And being in readiness for the encounter as good soldiers of Jesus Christ; with truth Not only with the truths of the gospel, but with truth in the inward parts, without which all our knowledge of divine truth will prove but a poor girdle in the evil day. Indeed, as faith is mentioned afterward as a distinct part of the spiritual armour, truth in this place cannot chiefly mean those truths which are the objects of the Christian faith, but rather a true or unfeigned profession of that faith, in opposition to that which is hypocritical, and uprightness of heart in our whole behaviour toward God and man, and a sincere desire to know and do the will of God, in all things. “It has often been observed,” says Doddridge, “that the military girdle was not only an ornament but a defence, as it hid the gaping joints of the armour, and kept them close and steady, as well as fortified the loins of those that wore it, and rendered them more vigorous and fit for action. The chief difficulty here is to know whether truth refers to the true principles of religion, or to integrity in our conduct: and how, on the latter interpretation, to keep it distinct from the breast-plate of righteousness, or, on the former, from the shield of faith. But it seems probable to me, that it may rather signify some virtue of the mind, as all the other parts of the armour enumerated do; and then it must refer to that uprightness and sincerity of intention, which produces righteousness, or a holy and equitable conduct, as its proper fruit.” Thus our Lord is described, Isaiah 11:5; and as a man girded is always ready for action, and a soldier, who is girded with the military belt, is fitted either for marching or fighting; so this seems intended to intimate an obedient heart, a ready will. Our Lord adds to the loins girded, the lights burning, Luke 12:35; showing that watching and ready obedience are inseparable companions. And having on the breast-plate of righteousness Imputed and implanted, justification and sanctification, or pardon and holiness. See on Romans 4:5; Romans 4:8; Rom 6:6-22; 1 Corinthians 1:30. In the breast is the seat of conscience, which is guarded by righteousness imputed to us in our justification, implanted in us in our regeneration, and practised by us in consequent obedience to the divine will. In the parallel place, 1 Thessalonians 5:8, this piece of spiritual armour is called the breast-plate of faith and love; justification being received by faith, and love being the source of all our holiness. Perhaps the apostle, in this passage, alluded to Isaiah 59:17, where the Messiah is said to have put on righteousness as a breast-plate; that is, by the holiness of his conduct, and his consciousness thereof, he defended himself from being moved by the calumnies and reproaches of the wicked. No armour for the back is mentioned; we are always to face our enemies.