Jesus is the Head of the Body; He also is the Body of the Head

We are the body of Christ, because of Christ in us. Nothing makes us part of the church except Christ in us and us in Christ

We as the believers, Jew & Gentile are now incorporated in this One New Man – The Church His Body

having abolished in His flesh the enmity, that is, the law of commandments contained in ordinances, so so as to create in Himself ONE NEW MAN from the two, thus making peace,16. and that He might reconcile them both to God in one body through the cross, thereby putting to death the enmity.17. And He came and preached peace to you who were afar off and to those who were near.18. For through Him we both have access by one Spirit to the Father.

Now, therefore, you are no longer strangers and foreigners, but fellow citizens with the saints and members of the household of God,20. having been built on the foundation of the apostles and prophets, Jesus Christ Himself being the chief cornerstone,21. in whom the whole building, being joined together, grows into a holy temple in the Lord,22. in whom you also are being built together for a dwelling place of God in the Spirit.

Ephesians 2:15-22

Christ created the one new man, the church, by working God’s divine nature into us. In the old creation God did not work His nature into any of His creatures, not even into man. In the creating of the One New Man, however, God’s nature was wrought into us to make His divine nature one us, and us one with Him.

Christ is not only the Creator of the one new man, He is also the very substance of the new man

The church is not only the church of God, the Body of Christ (the fullness, the expression, of the all-filling One — Eph 1:22-23), and the household or family, the house, the temple, and the dwelling place of God (Eph 2:19, 21-22); it is also the One New Man, which is corporate and universal, composed of all the believers, who, though we are many, we are also One New Man.

God’s dwelling in the Spirit

The believers’ human spirit, which is indwelt by God’s Holy Spirit. God’s Spirit is the Dweller, not the dwelling place. The dwelling place is the believers’ spirit. God’s Spirit dwells in our spirit. Therefore, the dwelling place of God is in our spirit. Verse 21 says that the holy temple is in the Lord, and this verse, that the dwelling place of God is in spirit. This indicates that for the building of God’s dwelling place, the Lord is one with our spirit, and our spirit is one with the Lord (1 Cor. 6:17). Our spirit is where the building of the church, the dwelling place of God, takes place.