Paul's heart of gratitude, and his practice of prayer, served to protect and grow his relationships with people in the church at Ehpesus. He communicates with them, and not only expresses his gratitude for the Ephesians, but also blesses them (Eph. 1:3) and instructs them throughout his letter. Paul is invested. These people were given to Paul in trust by God, and so he felt appropriately responsible to cultivate the relationship. He followed through with his calling.