The new Covenant though DID usher in a new relationship between God and man
No, it did not! There are only two possible states and relationship between God and man:
1. Lost or saved
2. In the flesh or in the Spirit
3. Unregenerated or regenerated
4. His children or Satan's children
5. His kingdom or Satan's kingdom
6. Redeemed or unredeemed
but theyu were not seal and indwelt as we are today, for the saints NOW have immediate access to the throne of grace, AND have the Holy Spirit inside of them!
According to who? Not according to Paul - Rom. 8:8-9! Not according to David (Psa. 89). You don't believe that Abel, Noah or Abraham had immediate access to throne of grace? Who did they go through?????
And the Body of Christ is the Brisde is the Church, ALL sinners saved by grace of god since time of Christ...
Pure unadulterated hogwash! Revelation 18:4 and 21:24 prove that all believers since Christ are not in the bride. Your ecclesiology is based upon eisgesis and complete perversion of Biblical context. You are in reality teaching "another gospel" and perverting the gospel of Jesus Christ just as much as sacramental theology perverts the gospel of Jesus Christ just as much as sprinkling and pouring pervert the gospel of Jesus Christ - not a whit of difference!
we have it from the writings of the New Testament
No you do not! You must pervert the Word of God to teach that Catholic doctrine. Find the words "universal" or "invisible" in the New Testament description of the church? Find any metaphor used of the church that infers universality or invisiblity? Find where only saints from Pentecost forward are only "in Christ" (Eph. 1:4)????? Find anywhere in scripture where more than two classifications of mankind are ever listed???
OT believers were NOT included in the Body/bride/Church of Christ, in so much as the Lord did remit their sins, but they were NOT spiritually united with yeshua, as THAT act by God was not in effect until the coming of the Holy Spirit in order to usher in the new Covenant Age!
And its NOT an eternal Covenant, but more sl like an Eternal Election in the Bible.....