Paul who was from the city of Tarsus, wrote Ephesians. He had been known as Saul in his early life. Before becoming a Christian, Paul was a Pharisee. He persecuted Christians. After he became a Christian, he traveled several times throughout the Roman Empire telling people about Jesus.
The Apostle Paul helped start the church in Ephesus on one of his trips. He also lived in Ephesus for a year and a half and helped the believers there. Paul probably wrote this letter while he was in prison in Rome.
Paul wrote this letter to the Christians in Ephesus to explain God's love for them in Christ Jesus. He described the blessings that God was giving them because they were now united with Christ. He explained that all believers are united together, whether Jew or Gentile. Paul also wanted to encourage them to live in a way that pleases God.