Second Thessalonians has many parallels to its companion letter. The Christians in Thessalonica were still struggling with major problems, and each of the three chapters of this book concerns one of them.
Chapter 1 gives encouragement to Christians who were undergoing persecution for their faith. Chapter 2 attacks head-on the false teaching about the day of the Lord. Rumors about the day of the Lord has caused great excitement and speculation, leading to the practical errors Paul addresses in chapter 3.
Paul's specific words about what must happen before the day of the Lord make this letter a key part of New Testament prophecy. The prophecy passages aren't self-explanatory, and may require a Bible reference book for undergoing.
Although II Thessalonians is Paul's shortest letter to a church, it contains four of his prayers. Note especially his concern for the Thessalonians as expressed in the prayers.
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