The letter names Paul, imprisoned for Christ, as sender, but many scholars think a later disciple wrote in Paul’s name; others defend Pauline authorship. “In Ephesus” is absent from several early manuscripts, so the work may have circulated among churches in western Asia Minor rather than addressing Ephesus alone. If Pauline, it is often dated around AD 60–62 during Roman imprisonment; if post-Pauline, commonly around AD 70–90. Unlike Paul’s highly specific letters, Ephesians offers a broad vision of God’s plan to unite all things in Christ, reconcile Jews and Gentiles as one body, and form a holy, loving, resilient church. Acts 19–20 supplies the traditional Ephesian background for the letter, which closely parallels Colossians and names Tychicus as messenger.
Paul unfolds the staggering spiritual blessings that belong to every believer in Christ — election, redemption, and the Spirit's seal — and reveals the long-hidden mystery that Gentiles are now fellow heirs of the same body.
Paul's great 'therefore' turns three chapters of doctrine into a call to walk worthy of the calling, as believers pursue the seven unities of the Spirit, grow into Christlike maturity through gifted leaders, and order their households under the lordship of Christ.
Paul closes Ephesians by calling believers to stand firm in spiritual warfare, clothing themselves in the full armor of God — equipment drawn from Isaiah's portrait of the LORD's own armor — and sustaining the battle through persistent prayer.