2 Thessalonians charges out of the gate by discussing two of the scariest subjects in Scripture: hell and the antichrist. Both of these frightening subjects carry a message of hope for the church experiencing a sampling of hell and antichrist-like figures.
1 Thessalonians concludes with a to do list of 15 commands for the believer and then states that God is faithful and He will do it. Seems like a contradiction but it is actually the key to growing in our faith.