https://www.mljtrust.org/sermons-online/ephesians-3-2-7/two-mysteries-jew-gentile/

True unity can exist within the church. Since Christians are fellow heirs, members of the same body, and partakers of the promise, harmony can be found between Jew and Gentile. In this sermon on Ephesians 3:2–7 titled “Two Mysteries – Jew, Gentile,” Dr. Martyn Lloyd-Jones discusses the general mystery of Christ that is the glorious story of the gospel and the particular mystery of the Gentiles now being fellow heirs, members of the same body, and partakers of the promise just as the Jews. Dr. Lloyd-Jones stresses here the importance that there now is no difference as to membership in the family of God between Jews and Gentiles. There is no longer a need for a Gentile to become a Jewish proselyte since they are now members of the same body. This is important because this mystery had not always been known to the people of God. Paul, here in this text, is pointing out that this mystery has now been revealed and Jew and Gentile are members of the same body. Amidst this glorious message of salvation Dr. Lloyd-Jones also takes time to address a particular fallacy that is believed by some regarding this text and the biblical evidence against it.