For they that sleep, sleep in the night, &c. Night is the time for sleep, and they that are guilty of drunkenness, gluttony, and other vices of intemperance, generally choose to hide them under the cover of darkness; and if we were still in the night of heathenish ignorance, and in a state of spiritual blindness and unbelief, our insensibility of divine things, our unwatchfulness, sloth, and indolence would have some excuse: but being of the day And brought out of darkness into Christian and marvellous light, we have none: let us, therefore, be sober That is, temperate, chaste, holy, and wakeful, as νηφωμεν signifies; putting on the breast-plate of faith and love As a defence of the heart, the seat of the passions; and for a helmet Which will defend the head, the seat of reason; the hope of final, eternal salvation. The breast and head being particularly exposed in battle, and wounds in these parts being extremely dangerous, the ancients carefully defended them by armour, to which the apostle here compares the Christian virtues of faith, love, and hope. In the parallel passage, Ephesians 6:14, the expression, instead of the breast- plate of faith and love, is the breast-plate of righteousness; to show that the righteousness of a Christian consists in faith and love: a breast-plate which, being of a truly heavenly fabric, will, if put on, and not afterward put off, render the heart, the seat of the affections, invulnerable. The apostle's meaning, stripped of the metaphor, is this: That, to defend our affections against the impressions of outward and sensible objects, nothing is so effectual as faith in Christ, and in the declarations and promises of his gospel, and love to God and man. The head being the seat of those thoughts and imaginations, on which the affections and passions in a great measure depend, it must be of great importance to defend it against the entrance of such thoughts and imaginations as have any tendency to excite bad affections or carnal desires. But for that purpose, nothing is better than to have the head so filled with the glorious hope of the salvation offered to us in the gospel, as to exclude all vain thoughts, imaginations, and expectations whatever. This hope therefore is most properly and elegantly termed the Christian's helmet. This exhortation to the Thessalonian believers teaches us that the sons of light must not only watch but fight. See note on Ephesians 6:11-18.
For God hath not appointed us to wrath As he hath the finally impenitent, unbelieving, and disobedient: for the design of God in sending his Son was not to condemn but to save the world; and therefore they who are appointed to wrath, are only such as through impenitence, unbelief, and disobedience, reject him and his gospel; but to obtain salvation Present and eternal; by faith in our Lord Jesus Christ Who hath procured it for all true persevering believers, whose faith worketh by love; and will assuredly at length bestow it upon them; of which he hath given us full proof, in that he not only became incarnate, and subjected himself to the infirmities of our flesh, and to the many burdens and sufferings of this mortal life, for our sakes, but even died in ignominy and torture on the cross for us; that whether we wake or sleep, live or die, we should live together with him In other words, That while we live, and when we die, the life and happiness of our immortal souls should be secure in a union with him, which death itself shall not be able to dissolve. Some interpret the expression, whether we wake or sleep, as signifying, “whether Christ come in the night, when we are sleeping on our beds, or in the day, when we are awake and busy in the pursuit of our common affairs.” But, as Doddridge has properly observed, since sleeping had just before been put for death, it seems more natural to interpret this clause as speaking of the state of believers, whether alive or dead: and then it must be considered as containing a direct proof of the life of the soul while the body is sleeping in the grave. “God forbid,” adds that pious divine, “that any should understand these words as intimating that Christ's death is intended to secure our salvation, whether we take a watchful care of it or not. Yet, alas! the generality of Christians (so called) live as if that were the genuine and only interpretation.” Wherefore comfort yourselves together Παρακαλειτε αλληλους comfort, or exhort one another, under the various afflictions of life, and edify Εις τον ενα, each the other; in Christian knowledge and holiness, or endeavour to promote the work of grace in one another; even as also I know ye do How well would it be, if professing Christians in general would emulate the character which the apostle gives to these believers at Thessalonica, if, “entering into each other's true interests, as Chandler observes, they would banish from their conversation that calumny, slander, folly, and flattery which engross so much of this short transitory life, and by discoursing of things of substantial worth, endeavour to fortify each other against the snares of life, and those innumerable temptations which lie in wait to ruin us. With what comfort should we meet each other at the great day, were we, on that occasion, able to recollect that in general we had managed our conversation to our mutual advantage? For we should then be sensible that in some measure we owe our glory to our concern for, and fidelity to, each other. Besides, the remembrance of this would enlarge the love of the saints to each other in the future state.”