Verses 1-5: The Concern and Warning. Paul begins by urging the Thessalonians not to be alarmed or deceived by false reports about the immediacy of Christ’s coming. He reminds them of prior teaching concerning the falling away and the man of sin.
Verses 6-12: The Mystery of Iniquity and the Man of Sin Revealed. This section explains the restraining force that currently holds back the revelation of the man of sin, who opposes God and exalts himself. Paul describes the coming of this wicked one, empowered by Satan’s signs and lying wonders, and the judgment that will come upon him.
Verses 13-17: Thanksgiving and Exhortation. Paul expresses gratitude for the believers’ election to salvation, calls them to stand firm in the traditions taught, and offers comfort and encouragement through the grace and hope provided by Jesus Christ and God the Father.