Enslaved People, Masters, and the One Heavenly Master
Ephesians speaks directly into the ancient institution of slavery. Enslaved believers are addressed as moral agents and told to render service as to Christ rather than merely for human approval. Masters are told to act by the same Lord-centered standard, to stop threatening, and to remember that both they and the enslaved have one Master in heaven who shows no partiality.
Where this fits in the story: the gospel enters an entrenched Greco-Roman household system and places every participant under Christ’s authority. The text destabilizes claims to ultimate human mastery by insisting on one impartial heavenly Master.