God’s New Testament building is God Himself with His people. Although today we often refer to a building with a steeple or a cross as a “church building,” in the New Testament a physical building is not God’s building, God’s dwelling place.
God’s building with His people is in spirit. In Ephesians 2:22 we “are being built together into a dwelling place of God in spirit.” Here God’s dwelling place is our human spirit. This matches 2 Timothy 4:22, “The Lord be with your spirit.” A number of English Bible translations end verse 2:22, “in the Spirit.” We should remember that the Spirit is one with our human spirit. In John 3:6 the Spirit causes our spirit to be born anew by imparting the divine life into our spirit. In Romans 8:11 the Spirit dwells in us, specifically in our spirit where the two witness together that we are children of God (v. 16). Therefore, we can say that God’s building is in our spirit mingled with the Spirit.
First Peter 2:4-5 declare that our Lord is a living stone and that by coming to Him we also, “as living stones, are being built up as a spiritual house.” We, built together with the Lord, are the spiritual house.
Revelation 21:3 tells us that New Jerusalem is “the tabernacle of God.” This tabernacle is the dwelling place of God, the consummation of the spiritual house. Because the city is spiritual, John says in Revelation 21:10 that he was carried away in spirit (or in the Spirit) to see New Jerusalem.