Chapter 1 - He gives thanks for the grace bestowed on the Thessalonians. Chapter 2 - The sincerity of the apostle's preaching the gospel to them and of their receiving it. Chapter 3 - The apostle's concern and love for the Thessalonians. Chapter 4 - He exhorts them to purity and mutual charity. He treats of the resurrection of the dead. Chapter 5 - The day of the Lord shall come when least expected. Exhortations to several duties.