The City of God is not merely a place to which we are going, but is the Church of God of which we are part.
We are going to Heaven, a place; we are not going to spaceless clouds for all eternity; but in considering the City of God, the Heavenly City, the New Jerusalem, we are considering the Church, the Body of Christ; and are only dealing with the nature and characteristics of that City as related to the ultimate things. We are not now touching questions related to times and dispensations. The last thing in the Word of God is a City and everything heads up to that. He is related to the City and the City to Him.
It is a concrete and all inclusive presentation in finality of all the spiritual elements and features of divine life in the individual and in the Church; the full and final expression of conformity to the image of God's Son; “chosen and fore-ordained to be conformed to the image of His Son.” Rom. 8:29.