Introduction to Ephesians: Our Identity Is In Christ
Collin Leong. September 21, 2025
A. Historical Summary
1. Author and His Background
Author: The Apostle Paul is widely accepted as the author of Ephesians (Ephesians 1:1; 3:1).
Background: Paul was a former Pharisee and persecutor of Christians who became a leading missionary after encountering Christ on the road to Damascus (Acts 9). He was deeply educated in Jewish law and Roman culture, which equipped him to bridge the gospel across ethnic and religious divides. Paul spent about three years ministering in Ephesus during his third missionary journey (Acts 19:1–20:1).
2. Audience and Their Background
Recipients: The letter is addressed to the church in Ephesus (Ephesians 1:1), though some early manuscripts suggest it may have been a circular letter intended for multiple churches in Asia Minor.
Background: Ephesus was a major Roman city in Asia Minor (modern-day Turkey), known for its commerce, culture, and especially the Temple of Artemis, one of the Seven Wonders of the Ancient World. The church was composed of both Jewish and Gentile believers, and Paul’s letter addresses unity and spiritual maturity in this diverse community.
3. Date and Location of Writing
Date: Around AD 60–62, during Paul’s first imprisonment in Rome (Acts 28:16–31).
Location: Written from Rome, likely alongside Colossians and Philemon, and delivered by Tychicus (Ephesians 6:21–22).
4. Purpose and Theme
Purpose:
- To reveal the mystery of the Church—a unified body of Jews and Gentiles in Christ (Eph 3:6).
- To affirm believers’ identity in Christ—chosen, redeemed, and sealed by the Holy Spirit (Eph 1:3–14).
- To emphasize salvation by grace through faith, not by human effort (Eph 2:8–9).
- To encourage unity and maturity within the Church, urging believers to live worthy of their calling (Eph 4:1–16).
- To equip believers for spiritual warfare, highlighting the armor of God (Eph 6:10–18).
Themes:
Spiritual Identity: Believers are chosen, redeemed, and sealed in Christ.
Unity in the Church: Jews and Gentiles are one body through Christ.
Christian Conduct: Believers are called to live in love, purity, and submission.
Spiritual Warfare: Christians must stand firm against evil using the armor of God.
B. Key Messages
1. Spiritual Identity in Christ
Message: Believers are chosen, redeemed, and sealed by the Holy Spirit. Paul emphasizes that our identity is rooted in God's eternal plan, not in human achievement (Ephesians 1:3–14).
Application:
- Anchor your self-worth in what God says about you, not in external validation.
- Live with confidence and gratitude, knowing you are fully accepted in Christ.
- Reject lies of inadequacy or comparison—your identity is secure and unchanging.
2. Salvation by Grace through Faith
Message: Salvation is a gift from God, not earned by works. We are saved to do good works, not by them (Ephesians 2:8–10).
Application:
- Stop trying to earn God's favor—receive His grace freely.
- Serve others out of love, not obligation or guilt.
- Share the gospel clearly: salvation is by grace, not performance.
3. Unity in the Body of Christ
Message: Jews and Gentiles are reconciled into one spiritual family. The church is called to live in unity and peace (Ephesians 2:11–22; 4:1–6).
Application:
- Promote reconciliation and inclusion in your church and community.
- Avoid division over secondary issues—focus on shared faith in Christ.
- Celebrate diversity as part of God’s design for His people.
4. Spiritual Maturity and Growth
Message: Believers are called to grow in Christlikeness, using their gifts to build up the church (Ephesians 4:11–16).
Application:
- Invest in spiritual growth through Scripture, prayer, and community.
- Use your gifts to serve others and strengthen the church.
- Pursue maturity—not just knowledge, but character transformation.
5. Holy Living in Daily Life
Message: Christians are called to live differently—marked by love, purity, and wisdom in relationships and conduct (Ephesians 4:17–5:21).
Application:
- Let your faith shape your choices in speech, sexuality, and integrity.
- Practice forgiveness and kindness in your relationships.
- Make wise decisions that reflect God’s values, not cultural trends.
6. Christ-Centered Relationships
Message: Marriage, parenting, and work relationships should reflect mutual respect and submission under Christ’s authority (Ephesians 5:22–6:9).
Application:
- Honor Christ in your family and workplace by serving others well.
- Lead with humility and love, not control or pride.
- Build relationships on trust, respect, and shared purpose.
7. Spiritual Warfare and Readiness
Message: Believers must be equipped to stand against spiritual opposition using the armor of God (Ephesians 6:10–20).
Application:
- Stay alert to spiritual challenges—don’t ignore the battle.
- Rely on truth, righteousness, faith, and prayer to stay grounded.
- Encourage others to stand firm in their faith, especially in hard times.
C. Framework
The Calling and the Conduct: Identity and Instruction in Christ (Ephesians 1–6)
Paul writes to strengthen the church’s understanding of their spiritual identity and to instruct them on how to live in light of that identity. The letter moves from theological foundations to practical applications, emphasizing unity, maturity, and spiritual warfare.
Ch 1: The Blessing and the Belief Paul opens with praise for God’s spiritual blessings in Christ—election, adoption, redemption, and sealing by the Holy Spirit. He prays that believers would grasp the hope and power available to them.
Ch 2: The Grace and the Growth Paul explains salvation by grace through faith, not works. He describes how Jews and Gentiles are united in Christ, forming one new humanity and growing together into a spiritual temple.
Ch 3: The Mystery and the Mission Paul reveals the mystery of the gospel: Gentiles are fellow heirs. He shares his role in proclaiming this truth and prays for the church to be strengthened in love and filled with the fullness of God.
Ch 4: The Unity and the Maturity Paul urges believers to live in unity, grounded in one faith and one Lord. He outlines the purpose of spiritual gifts—to build up the body of Christ toward maturity and Christlikeness.
Ch 5: The Walk and the Wisdom Paul calls for a lifestyle marked by love, purity, and wisdom. He gives specific instructions for relationships—between spouses, and within households—based on mutual submission and reverence for Christ.
Ch 6: The Battle and the Boldness Paul closes with a call to spiritual readiness. He describes the armor of God and encourages believers to stand firm against spiritual forces. He asks for prayer so he can boldly proclaim the gospel.

