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The first epistle to the Thessalonians was the first of all Paul's epistles. It was in all probability written from Corinth, where he abode a "long time" (Act_18:11, Act_18:18), early in the period of his residence there, about the end of A.D. 52.
The occasion of its being written was the return of Timotheus from Macedonia, bearing tidings from Thessalonica regarding the state of the church there (Act_18:1-5; 1Th_3:6). While, on the whole, the report of Timothy was encouraging, it also showed that divers errors and misunderstandings regarding the tenor of Paul's teaching had crept in amongst them. He addresses them in this letter with the view of correcting these errors, and especially for the purpose of exhorting them to purity of life, reminding them that their sanctification was the great end desired by God regarding them.