In the first epistle, Paul corrected the error that had arisen among the Thessalonians concerning the saints who had died or fallen asleep (1 Thess. 4:14-18). In this second epistle, Paul corrects the error that they had concerning the living saints (2 Thess. 2:1-8).
Simple Outline of This Second Epistle
Chapter 1—Comfort for the saints who were passing through persecutions and tribulations resulting from being identified with the name of Christ.
Chapter 2—Correction for the saints concerning the false eschatological teaching that they had received regarding the order of events surrounding the Appearing of Christ.
Chapter 3—Counsel as to how to treat the practical problems that result from bad eschatological teaching in chapter 2.