6:10-18 Spiritual strength and courage are needed for our spiritual warfare and suffering. Those who would prove themselves to have true grace, must aim at all grace; and put on the whole armour of God, which he prepares and bestows. The Christian armour is made to be worn; and there is no putting off our armour till we have done our warfare, and finished our course. The combat is not against human enemies, nor against our own corrupt nature only; we have to do with an enemy who has a thousand ways of beguiling unstable souls. The devils assault us in the things that belong to our souls, and labour to deface the heavenly image in our hearts. We must resolve by God's grace, not to yield to Satan. Resist him, and he will flee. If we give way, he will get ground. If we distrust either our cause, or our Leader, or our armour, we give him advantage. The different parts of the armour of heavy-armed soldiers, who had to sustain the fiercest assaults of the enemy, are here described. There is none for the back; nothing to defend those who turn back in the Christian warfare. Truth, or sincerity, is the girdle. This girds on all the other pieces of our armour, and is first mentioned. There can be no religion without sincerity. The righteousness of Christ, imputed to us, is a breastplate against the arrows of Divine wrath. The righteousness of Christ implanted in us, fortifies the heart against the attacks of Satan. Resolution must be as greaves, or armour to our legs; and to stand their ground or to march forward in rugged paths, the feet must be shod with the preparation of the gospel of peace. Motives to obedience, amidst trials, must be drawn from a clear knowledge of the gospel. Faith is all in all in an hour of temptation. Faith, as relying on unseen objects, receiving Christ and the benefits of redemption, and so deriving grace from him, is like a shield, a defence every way. The devil is the wicked one. Violent temptations, by which the soul is set on fire of hell, are darts Satan shoots at us. Also, hard thoughts of God, and as to ourselves. Faith applying the word of God and the grace of Christ, quenches the darts of temptation. Salvation must be our helmet. A good hope of salvation, a Scriptural expectation of victory, will purify the soul, and keep it from being defiled by Satan. To the Christian armed for defense in battle, the apostle recommends only one weapon of attack; but it is enough, the sword of the Spirit, which is the word of God. It subdues and mortifies evil desires and blasphemous thoughts as they rise within; and answers unbelief and error as they assault from without. A single text, well understood, and rightly applied, at once destroys a temptation or an objection, and subdues the most formidable adversary. Prayer must fasten all the other parts of our Christian armour. There are other duties of religion, and of our stations in the world, but we must keep up times of prayer. Though set and solemn prayer may not be seasonable when other duties are to be done, yet short pious prayers darted out, always are so. We must use holy thoughts in our ordinary course. A vain heart will be vain in prayer. We must pray with all kinds of prayer, public, private, and secret; social and solitary; solemn and sudden: with all the parts of prayer; confession of sin, petition for mercy, and thanksgiving for favours received. And we must do it by the grace of God the Holy Spirit, in dependence on, and according to, his teaching. We must preserve in particular requests, notwithstanding discouragements. We must pray, not for ourselves only, but for all saints. Our enemies are mighty, and we are without strength, but our Redeemer is almighty, and in the power of his mighty we may overcome. Wherefore we must stir up ourselves. Have not we, when God has called, often neglected to answer? Let us think upon these things, and continue our prayers with patience.

Verses 10-20. - THE CHRISTIAN WARFARE. Verse 10. - Finally. The apostle has now reached his last passage, and by this word quickens the attention of his readers and prepares them for a counsel eminently weighty in itself, and gathering up the pith and marrow, as it were, of what goes before. "My brethren," A.V., is rejected by R.V, and most modern commentators, for lack of external evidence. We note, however, that, whereas in the preceding verses he had distributed the Ephesians into groups, giving an appropriate counsel to each, he now brings them again together, and has a concluding counsel for them all. Be strong in the Lord, and in the power of his might. Compare with Ephesians 3:16, where the heavenly provision for obtaining strength is specified, and with Ephesians 4:30, where we are cautioned against a course that will fritter away that provision. The ever-recurring formula, "in the Lord," indicates the relation to Christ in which alone the strength can be experienced (comp. 2 Corinthians 12:9). The might is Christ's, but by faith it becomes our strength. As the steam-engine genders the dynamic force, which belts and wheels communicate to the inert machinery of the factory, so Christ is the source of that spiritual strength which through faith is communicated to all his people. To be strong is our duty; to be weak is our sin. Strong trust, strong courage, strong endurance, strong hope. strong love, may all be had from him, if only our fellowship with him be maintained in uninterrupted vigor.

Finally, my brethren,.... This is the conclusion of the apostle's exhortations, in which he addresses the saints as his brethren; which appellation he uses, not merely as a familiar way of speaking among the Jews, but in regard to them as regenerate persons, and of the same family and household of God with himself; and he calls them so, to show his humility, and as a proof of his affection to them, and with a design to encourage them to their duty, as follows:

be strong in the Lord, and in the power of his might; which is directed to, partly on account of the things before exhorted to, which could not be performed in their own strength; and partly with respect to their many and potent enemies hereafter mentioned, against whom they had no might nor power of their own; and therefore the apostle points out the Lord Jesus Christ unto them, in whom are strength, power, and might, even everlasting strength, to enable them to perform their duty, and to fight against every enemy, sin, Satan, and the world; for though they are weak, and strength in themselves, and can do nothing of themselves, and without Christ; yet since there is strength in him, which is communicable to them, they may expect it from him, and depend upon it; and they may come at, or strengthen themselves in it, and by it, by meditation on it, by prayer for it, by waiting on Christ in his own ways, by exercising faith upon him, and through the Spirit, who strengthens them from him with might in the inward man.

10. my brethren—Some of the oldest manuscripts omit these words. Some with Vulgate retain them. The phrase occurs nowhere else in the Epistle (see, however, Eph 6:23); if genuine, it is appropriate here in the close of the Epistle, where he is urging his fellow soldiers to the good fight in the Christian armor. Most of the oldest manuscripts for "finally," read, "henceforward," or "from henceforth" (Ga 6:17).

be strong—Greek, "be strengthened."

in the power of his might—Christ's might: as in Eph 1:19, it is the Father's might.

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