v1-2: Paul is concerned about false teaching concerning the Lord's return. The coming of the Lord and our gathering together to Him, are to be expected at the same time, 1 Thess 4.16-17.
The false teachers used three methods to bring their error;
- by spirit, that is, by alleged prophecy or revelation;
- by report or word, that is, teaching allegedly given by Paul or another apostle;
- by letter, for example, 2 Cor 3.1; perhaps a reference to a counterfeit letter which was circulating amongst churches.
We can expect the enemy to use different tactics against different churches. We are not to be unsettled or alarmed by such things. Rather we must stand fast, and trust what God has said (v15). By implication, the day of the Lord had not already come, for that must follow the Lord's return.
v3-4: The Day of the Lord will be preceded by the falling away, compare 1 Tim 4.1-3, and by the revealing of the man of sin, see Mark 13.14-23; Rev 13.13-14. He will seek to usurp the rule and authority of the true God, even by lying wonders, as in v9.
v5: Paul had already taught the Thessalonians these things.
v6-7: The restraining influence from the Lord will be removed, and the man of sin (the mystery of lawlessness) will be fully revealed. Such is God's mercy, even to unbelievers, that this restraint remains.
We understand that the restraint is God's Holy Spirit within the church. When the church is taken up, at Christ's return, this restraint is removed.
v8: Although the lawless one, the man of sin, will be revealed, we can have every confidence that the Lord will consume him and destroy him. The lawless one will only have freedom for a time, before he is destroyed.
v9-10: The lawless one is empowered by Satan, and performs counterfeit miracles, deceptions, and deceiving many who do not obey the truth. The spiritual man has discernment, and sees beyond appearance.
v11-12: Many prefer Satan's lies to God's truth. God will send a strong delusion, which confirms them in their unbelief and unrighteous behaviour. Here too is assurance that God is in total control, and that He is constantly active in the world. This is consistent too with Rom 1.21-32, where God gives up mankind to corrupt belief and behaviour.
v13: Our confidence; we are chosen by God for salvation, proved by sanctification by the Spirit, and our belief in the truth. Here word and Spirit work together in us, bringing holiness. Holy living reflects our holy calling. Here is security; chosen "from the beginning," and chosen for holy living, for conformity to Christ. See also 1 Thess 4.3; here in Paul's earliest letters, he sets down the call to holiness.
v14: We are called by the gospel by the almost unimaginable glory of Christ, as well as to the holiness of Christ.
v15: We must therefore stand fast; the world is not our friend to cling to, rather we must hold the truth in Christ. Our confidence in the promises of God motivates us, not to complacency, but to stand fast.
v16-17: Paul's prayer;
- He has confidence of everlasting consolation, something to come; and
- He has a request for comfort and strength, something for today.
- We are to be established in good words and works, declaring the truth of the gospel by our lives.