Acts 20:28: Shepherd the Flock God Purchased
Acts 20:28 grounds the shepherd's charge in two facts: the Holy Spirit appointed overseers, and the flock belongs to the Lord who purchased it. Care for God's people is obedience to him, not a leader's private project.
Acts 20:28: How to Choose a Church
Paul's charge to the Ephesian overseers turns church choice away from consumer preferences and toward the flock Christ purchased and the shepherds God appoints. A church is weighed by faithful shepherding around the whole counsel of God.
Communicatio idiomatum: speaking truly about the person of Christ: A Biblical Guide
Acts 20:28 says God purchased the church with his own blood, a sentence the church reads through the one person of Christ. Because the person is one, what is true of either nature is truly said of him, and that grammar guards both the mystery and the flock.