“But the Lord is faithful; he will strengthen you and guard you from the evil one. And we are confident in the Lord that you are doing and will continue to do the things we commanded you.”
2 Thessalonians 3.3-4 NTL
The faithfulness of God helps us to recognize and have confidence in the faithfulness of the saints.
Why write a letter to a church like the one in Thessalonica who is faithful?