Allen2 writes: "If Israel and the Church are on two distinguishable tracks, how does this square with Paul's statement: "through the gospel the Gentiles are heirs together WITH ISRAEL, MEMBERS TOGETHER OF ONE BODY, and sharers together in the promise in Christ Jesus", Eph.3:6.?"
Chapter 3 of Ephesians defines the Church as a secret, before unrevealed, that provides for the forming of a new Body by making Gentiles fellow heirs, and of the same body. I see no ground for contention that the "promise in Christ by the gospel" is something that had never been heard? I believe it was as new to the Jew as to the Gentile. According to verse five, Paul's revelation is the unfolding of a mystery, or secret, "which in other generations was not made known to the sons of men, as it has now been revealed to His holy apostles and prophets in the Spirit."
The book of Acts (chapter 15) deals with the Council at Jerusalem and relates their coming to an understanding of a new divine purpose (vss 13-18). Look closely at (vs 16), "After these things I will return, and I will rebuild the tabernacle of David which has fallen and I will rebuild its ruins, and will restore it." What does this passage refer back to? Was it not that God first would take from among the Gentiles a people for His name? Since the gospel had grown beyond just the Jews, the Council met to consider what had become of the Jewish covenants and promises. The conclusion was clear: God was working among the Gentiles as well, and after this new purpose was complete God's dealings with the Jewish covenants and promises would be revisted. That Jews were already being visited and were being saved was taken for granted. Therefore, the new purpose of God was accepted by those who were saved and its message proclaimed to Jew and Gentile alike.
In the Abrahamic covenant God numbers Abrahams descendants as the "dust of the earth" (Gen. 13:16) and as the "stars of heaven" (Gen. 15:5). One relates to his earthly line or his literal descendants and the other relates to the Church, his heavenly descendants.
The Christian is a citizen of heaven (Eph. 2:6) and an ambassador for Christ (2 Cor. 5:20). We aren't supposed to be looking for a long life here, but are to be looking for the coming of our Lord. In contrast Israel is looking forward to the promised land (Gen. 15:18).
In Christ,
Tracey