From these words it appears that some among the Thessalonians had mistaken the apostle’s meaning, in what he had written in his former epistle about the coming of Christ, by thinking that it was near at hand,—that Christ was just ready to appear and come to judgment. Or, it may be, some among them pretended that they had the knowledge of this by particular revelation from the Spirit, or from some words they had heard from the apostle, when he was with them, or some letter he had written or they pretended he had written to them or some other person: and hereupon the apostle is careful to rectify this mistake, and to prevent the spreading of this error. Observe, If errors and mistakes arise among Christians, we should take the first opportunity to rectify them, and hinder the spreading thereof; and good men will be especially careful to suppress errors that may arise from a mistake of their words and actions, though that which was spoken or done was ever so innocent or well. We have a subtle adversary, who watches all opportunities to do mischief, and will sometimes promote errors even by means of the words of scripture. Observe,

I. How very earnest and solicitous this apostle was to prevent mistakes: We beseech you, brethren, etc., 2 Thess. 2:1. He entreats them as brethren who might have charged them as a father charges his children: he shows great kindness and condescension, and insinuates himself into their affections. And this is the best way to deal with men when we would preserve or recover them from errors, to deal gently and affectionately with them: rough and rigorous treatment will but exasperate their spirits, and prejudice them against the reasons we may offer. He obtests and even conjures them in the most solemn manner: By the coming of Christ, etc. The words are in the form of an oath; and his meaning is that if they believed Christ would come, and if they desired he would come, and rejoiced in the hope of his coming, they should be careful to avoid the error, and the evil consequences of it, against which he was now cautioning them. From this form of obtestation used by the apostle, we may observe,

1. It is most certain that the Lord Jesus Christ will come to judge the world, that he will come in all the pomp and power of the upper world in the last day, to execute judgment upon all. Whatever uncertainty we are at, or whatever mistakes may arise about the time of his coming, his coming itself is certain. This has been the faith and hope of all Christians in all ages of the church; nay, it was the faith and hope of the Old-Testament saints, ever since Enoch the seventh from Adam, who said, Behold, the Lord cometh, etc., Jude 1:14.

2. At the second coming of Christ all the saints will be gathered together to him; and this mention of the gathering of the saints together unto Christ at his coming shows that the apostle speaks of Christ’s coming to judgment day, and not of his coming to destroy Jerusalem. He speaks of a proper, and not a metaphorical advent: and, as it will be part of Christ’s honour in that day, so it will be the completing of the happiness of his saints. (1.) That they all shall be gathered together. There will then be a general meeting of all the saints, and none but saints; all the Old-Testament saints, who got acquaintance with Christ by the dark shadows of the law, and saw this day at a distance; and all the New-Testament saints, to whom life and immortality were brought to light by the gospel; they will all be gathered together. There will then come from the four winds of heaven all that are, or ever were, or ever shall be, from the beginning to the end of time. All shall be gathered together. (2.) That they shall be gathered together to Christ. He will be the great centre of their unity. They shall be gathered together to him, to be attendants on him, to be assessors with him, to be presented by him to the Father, to be with him for ever, and altogether happy in his presence to all eternity. (3.) The doctrine of Christ’s coming and our gathering together to him is of a great moment and importance to Christians; otherwise it would not be the proper matter of the apostle’s obtestation. We ought therefore not only to believe these things, but highly to account of them also, and look upon them as things we are greatly concerned in and should be much affected with.

II. The thing itself against which the apostle cautions the Thessalonians is that they should not be deceived about the time of Christ’s coming, and so be shaken in mind, or be troubled. Note, Errors in the mind tend greatly to weaken our faith, and cause us trouble; and such as are weak in faith and of troubled minds are oftentimes apt to be deceived, and fall a prey to seducers. 1. The apostle would not have them be deceived: Let no man deceive you by any means, 2 Thess. 2:3. There are many who lie in wait to deceive, and they have many ways of deceiving; we have reason therefore to be cautious and stand upon our guard. Some deceivers will pretend new revelations, others misinterpret scripture, and others will be guilty of gross forgeries; divers means and artifices of deceit men will use; but we must be careful that no man deceive us by any means. The particular matter in which the apostle cautions them not to be deceived is about the near approach of Christ’s coming, as if it was to have been in the apostle’s days; and harmless as this error might seem to many, yet, because it was indeed an error, it would have proved of bad consequences to many persons. Therefore, 2. He gives them warning, and would not have them be soon shaken in mind, nor be troubled. (1.) He would not have their faith weakened. We should firmly believe the second coming of Christ, and be settled and established in the faith of this; but there was danger lest the Thessalonians, if they apprehended the coming of Christ was just at hand, upon finding that they, or others whom they too much regarded, were mistaken as to the time, should thereupon question the truth or certainty of the thing itself; whereas they ought not to waver in their minds as to this great thing, which is the faith and hope of all the saints. False doctrines are like winds, that toss the water to and fro, and they are apt to unsettle the minds of men, who are sometimes as unstable as water. Then, (2.) He would not have their comforts lessened, that they should not be troubled nor affrighted with false alarms. It is probable that the coming of Christ was represented in so much terror as to trouble many serious Christians among them, though in itself it should be matter of the believer’s hope and joy; or else many might be troubled with the thought how surprising this day would be, or with the fear of their unpreparedness, or upon the reflection on their mistake about the time of Christ’s coming: we should always watch and pray, but must not be discouraged nor uncomfortable at the thought of Christ’s coming.