Thanks to Stefan at www.agodman.com/blog for this solid post on New Jerusalem.
The consummation of the central vision of God’s economy and of the high peak of the divine revelation is the New Jerusalem (Rev. 21:2, 9-11); the New Jerusalem is a corporate God-man and the consummation of the high peak of the divine revelation.
The central vision of God’s economy is the experience of Christ as life for the producing and building up of the church as the Body of Christ. God has an economy, and in His economy He intends to dispense Himself into us to regenerate us, transform us, build us up, and glorify us, so that He may gain the church as the Body of Christ, His corporate expression in the universe.
This is what Paul was writing about in his 14 epistles; the central vision of Paul’s completing ministry is God in us as our contents, Christ as the mystery of God, and the church as the mystery of Christ.
ps: Stefan is a God-man because, like all believers in Jesus Christ, he is a man and God in Christ is in Him. In John 14:20 the Lord Jesus told us that after His resurrection we “will know that I am in My Father, and you in Me, and I in you.” Our being in Christ and Christ being in us is the reality of a God-man, but we are NOT part of the Godhead.