(8) Putting on.--A curiously abrupt transition, suggested by the sober vigilance just advocated. The Christian must be careful to watch, not only because the Lord is coming back at some unexpected hour, but also because there are enemies all round. He is not only the porter, sitting up to let his Lord in at any hour when He may return from the wedding (Mark 13:34; Luke 12:36), but the soldier standing sentry, liable to be surprised by the foe.

Breastplate of faith and love.--We have not to do with the Christian soldier as aggressive and going forth to conquer, which idea is developed in Ephesians 6:11 et seq., but only as defensive, and protected in breast and head against sudden blows. The three "theological virtues" are the Christian's defence. (Comp. 1Thessalonians 1:3; 1Corinthians 13:13.) The "breastplate" is a cuirass fitting close to the body, and in Ephesians this cuirass is composed of righteousness, while faith becomes the shield, and love disappears from the panoply. The "faith" here is a general trust in God's presence and goodness; the "love" is the love both of God and men. Perhaps it is unnecessary to inquire particularly why faith and love are represented as covering the body, and hope as covering the head. It seems far-fetched to consider the first two as keeping the heart, i.e., the affections, from injury; the third as preserving the brain, i.e., keeping us from miscalculating the dangers and so falling into despair. In the passage of Isaiah which St. Paul here imitates, the "helmet of salvation" appears to mean little more than a helmet which secures safety; but as one of the chief benefits which such armour confers is the confident hope of coming off unhurt, St. Paul fairly describes that hope itself as being a protection. In the forefront of the lost (Revelation 21:8) stand those who have had no "hope" or "trust."

Verse 8. - But; contrast to the conduct of those who are of the night: let us not only be watchful, but armed. The apostle now adopts a favorite figure, that of spiritual armor. The arms which he here mentions are only two - the breastplate to protect the heart, and the helmet to guard the head; they are both defensive weapons, because the reference here is not so much to the believer's conflict with evil, as to his defense against surprise. And by these spiritual weapons are denoted the three cardinal graces - faith, love, and hope (1 Thessalonians 1:3). Let us who are of the day, be sober, putting on the breastplate of faith and love. By "faith" is here meant faith in Christ; and by "love," not so much love to God as love to man. These preserve the heart of a Christian against the assaults and influences of evil, as the breastplate guards the heart of the earthly warrior. And for a helmet, the hope of salvation. Salvation in its most comprehensive sense. The hope of salvation sustains our courage amid all the trials of life by holding out to us the prospect of eternal blessedness. Vigilance is of no avail unless armed by faith, hope, and love. In the Epistle to the Ephesians there is a still fuller enumeration of the Christian armor (Ephesians 6:14-18); and there is a slight difference in the description of the weapons. Here the apostle speaks of the breastplate of faith and love; there of the breastplate of righteousness and of the shield of faith. Here the helmet is called the hope of salvation; there the apostle speaks of the helmet of salvation. And besides these defensive weapons, other weapons of defense and the sword, a weapon of offence, are mentioned.

5:6-11 Most of mankind do not consider the things of another world at all, because they are asleep; or they do not consider them aright, because they sleep and dream. Our moderation as to all earthly things should be known to all men. Shall Christians, who have the light of the blessed gospel shining in their faces, be careless about their souls, and unmindful of another world? We need the spiritual armour, or the three Christian graces, faith, love, and hope. Faith; if we believe that the eye of God is always upon us, that there is another world to prepare for, we shall see reason to watch and be sober. True and fervent love to God, and the things of God, will keep us watchful and sober. If we have hope of salvation, let us take heed of any thing that would shake our trust in the Lord. We have ground on which to build unshaken hope, when we consider, that salvation is by our Lord Jesus Christ, who died for us, to atone for our sins and to ransom our souls. We should join in prayer and praise one with another. We should set a good example one before another, and this is the best means to answer the end of society. Thus we shall learn how to live to Him, with whom we hope to live for ever.But let us, who are of the day, be sober,.... As in body, so in mind; let us cast off the works of darkness, and have no fellowship with them; since the day of grace has passed upon us, the darkness is gone, and the true light shines, let us walk as children of the light, living soberly, righteously, and godly:

putting on the breastplate of faith and love; this is the coat of mail, 1 Samuel 17:5 which was made of iron or brass; and the Ethiopic version here calls it, "the iron coat." The allusion seems to be to the high priest's breastplate of judgment, in which were put the Thummim and Urim, which signify perfections and lights; faith may answer to the former, and love to the latter: these two graces go together, faith works by love, and love always accompanies faith; as there can be no true faith where there is no love, so there is no true love where faith is wanting: "faith" is a considerable part of the Christian soldier's breastplate, and answers the end of a breastplate, it being that grace which preserves the vitals of religion, and keeps all warm and comfortable within; and secures the peace and joy of the saints, as it has to do with Christ and his righteousness; wherefore this breastplate is called "the breastplate of righteousness", Ephesians 6:14, it fortifies the soul, and preserves it from Satan's temptations, from his fiery darts entering, and doing the mischief they would; it defends the heart against the errors of the wicked, for a man that believes has a witness in himself to the truths of the Gospel, and therefore cannot be easily moved from them; and strengthens a man against the carnal reasonings of the mind, for faith in the promises of God surmounts all the difficulties that reason objects to the fulfilling of them; and secures from the fears of death, the terrors of the law, and dread of the wrath of God: and love is the other part of the breast plate; love to God and Christ is a means of keeping the believer sound both in faith and practice; for a soul that truly loves God and Christ cannot give in to principles that depreciate the grace of God, and derogate from the glory and dignity of the person and office of Christ, or the work of the Spirit; and such love the ordinances and commands of Christ, and hate every false way of worship, or invention of men; and love to the saints is the bond of perfectness, knits them together, preserves unity and peace, and fortifies against the common enemy:

and for an helmet, the hope of salvation; the helmet is that part of armour which covers the head, and was made of brass, 1 Samuel 17:5 and used to be anointed with oil, that it might shine the brighter, last the longer, and more easily repel blows; to which this grace of the Spirit, hope of salvation by Christ, is fitly compared: for by "salvation" is meant salvation by Christ, spiritual salvation, and that as complete in heaven; and hope is a grace wrought in the soul by the spirit of God, which has for its foundation Christ and his righteousness, and for its object the heavenly glory; it covers the head in the day of battle, and preserves from being overcome by sin and Satan, when one that is destitute of it says there is no hope, and we will walk every man after the imagination of his own evil heart; it erects the head in time of difficulty, amidst tribulation and afflictions; it defends it from fears of divine wrath which is revealed from heaven, and sometimes in appearance seems to hang over it; and it preserves from Satan's temptations, and being carried away with the error of the wicked, from the hope of the Gospel: and thus a Christian clothed and armed with these graces, faith, hope, and love, should be so far from indulging himself in sin and sloth, that he ought always to be sober and watchful, and prepared to meet the enemy in the gate; and be ready, always waiting for his Lord's coming.