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Why is Paul writing the church at Thessalonica another letter? The consensus answer is that the church received a letter claiming to come from Paul has circulated to the church. This letter claimed that the “Day of the Lord” has already occurred. Paul writes to calm their fears and to assure then that the Day of the Lord has not yet arrived since the “Man of Lawlessness” has not been revealed.
Paul writes this second letter to clarify that Christians might suffer before the return of the Lord. First, suffering cannot be taken as an indication that the Great Tribulation has begun because God has an appointed time when the restraining power of God is removed from the world, permitting the Lawless One to be revealed.
Second, suffering ought not be taken as an indication of divine disfavor nor should the Christian think that they are dishonored because they are being persecuted. This sort of suffering is the lot of the Christian and the endurance the church has already demonstrated is a worthy testimony of the Lord’s work in their church and is a source of boasting for Paul. Paul is pleased that they are steadfast as they endure persecution (1:4).
Third, the source of the suffering which the church is experiencing is not God, but rather Satan. God is not punishing them at all. Since they are a successful, growing church, Satan is attempting to distract them from their commission as a church and limit their effectiveness As Green observes, “the persecutions were those that they suffered at the hands of their contemporaries and that were motivated by Satan (1 Thess. 1.6; 2.14; 3.3–5).”
The major theme of the letter is that patient endurance in the face of persecution is an indication that the church is living a life comparable to the salvation they have already received. Christians are going to suffer naturally just like anyone, But Paul says in this letter that our response to suffering is an indication that we are “worthy of the kingdom of God.”
Paul’s letter reverses this popular thinking. It is not that God wants you to suffer illness and poverty, but rather than when you face trials your faith ought to be refined and renewed.