We learn in this teaching that the Thessalonian believers were enduring persecution, prompting the Apostle Paul—deeply concerned for their spiritual stability— to send Timothy to strengthen and encourage them. Timothy’s mission was to establish them in sound doctrine so their faith would not be shaken by afflictions or the temptations of the enemy. When Timothy returned with a glowing report of the Thessalonians’ unfaltering faith and active love, Paul was greatly comforted and energized in his own trials by their life of resilient faith, love, and perseverance.