Ephesians is a great study for us today because it is the first book of Paul's second ministry to the Gentiles. We know that Paul was called to be the minister to the Gentiles in Acts chapter 9 and Paul declares so in Hebrews 11:13 KJV. Paul had two ministries, the first was to the Jew, and the second was to the Gentile. With his Apostleship to the Gentiles, it took on a entirely new calling in Ephesians, which is considered his Prison ministry.
Paul's first seven books were part of his first ministry, and the second seven books are when the calling shifted to the Gentile only because he revealed a secret that was hidden in God before the foundation of the world. This study series looks at the secret now revealed to us called The Mystery.