God’s New Testament building is in the spiritual realm and is accomplished by growth in life. In John 14:6 this life is Jesus Christ. Growth in life is the increase of Christ as life in us. And, because we are united with Christ, this life growth is counted as our growth.
Ephesians 4:15-16 declares “holding to truth in love, we may grow up into Him in all things, who is the Head, Christ, out from whom all the Body, being joined together and being knit together through every joint of the rich supply and through the operation in the measure of each one part, causes the growth of the Body unto the building up of itself in love.” In these verses, we are holding to truth (Christ – John 14:6) in a loving relationship. This holding causes us to grow and this growth is into Him. Then out from Him as the Head of the Body there is a rich supply that involves the operation in each part, each believer. This operation produces the growth of the whole Body which issues in the building up of the Body in love.
In Ephesians 4 all the Christians are the Body of Christ, one with Him who is the Head. In Ephesians 5 all the Christians are also the wife of Christ, one with Him who is the Husband. This marital relationship extends into Revelation and is characteristic of New Jerusalem. The growth unto building up in Ephesians 4 extends into Ephesians 5 and from there all the way to New Jerusalem. Our loving the Lord makes us grow into Him and results in the operation of life in us for the building which ultimately is New Jerusalem.