Thessalonica is growing in faith. Paul’s catechesis is an exercise in growing in holiness. The Thessalonians were eager to hear the good news and were preparing for the second coming. Paul sees that they have already grown in love, and Christians must have love to care for their fellow Christians.
On the last day, those who persecuted Christians will be judged as well as those who were persecuted, who are being made worthy of the kingdom of God.