Ephesians 3:6

To wit, that the Gentiles are fellow-heirs, and fellow-members of the body, and fellow-partakers of the promise in Christ Jesus through the gospel.

To wit ... This has the meaning of "that is to say," or "namely." It is often used in legal documents for the purpose of introducing a detailed statement, or formal list.

Fellow heirs ... fellow members ... fellow-partakers ... It would have been difficult indeed to have piled together three expressions more eloquent of the absolute equality of privilege and blessing to be shared and shared alike by Jews and Gentiles in Christ. Of course, the Old Testament prophets had plainly foretold the salvation of Gentiles; and, in Romans, Paul cited references from all three of the major Old Testament divisions in which there were definite and undeniable foreshadowings of his own mission to the Gentiles; "but the thing not visible in the Old Testament was that the Gentile sharing of these blessings involved the creation of `one new man' (Ephesians 2:15),"[16] and that there would be no separate organization for either Jews or Gentiles, both being incorporated into the one body, the church.

As Alfred Martin put it: "The mystery was not that the Gentiles should be saved - there is much in the Old Testament concerning that, particularly in Isaiah - but that they should be joined with Jews in one body!"[17]

[16] Ibid.

[17] Alfred Martin, Wycliffe Bible Commentary, New Testament (Chicago: Moody Press, 1971), p. 736.