A mostly-Gentile church, suffering opposition from both Jews and Gentiles, accusing them of a false new religion. What do they need to know to be reassured they are in the truth as they suffer?

Union with Christ (1 Thessalonians 2:14)
Union in Suffering (1 Thessalonians 2:14)
Union with the Prophets (1 Thessalonians 2:15)
Union with the Plan of God (1 Thessalonians 2:16)

Suffering is actually affirmation because suffering for the gospel is mandatory because it is the hallmark to advance the gospel worldwide.

https://youtu.be/hRr-D5k6NBI