The book of Ephesians begins with Paul expressing gratitude for the Ephesians' faith and explaining that God chose them to be holy and blameless before the foundation of the world. Believers have redemption through Christ's blood and are saved by grace through faith, not by works. The passage emphasizes living a life worthy of one's calling, with humility and patience, and striving to preserve the unity of the Spirit. It provides practical instructions on virtuous living, including speaking the truth and being kind to one another. Believers are instructed to imitate God by walking in love, avoid immorality, and be filled with the Holy Spirit. The book concludes with instructions on relationships and spiritual warfare, urging believers to put on the armor of God to withstand evil forces.