In this view, when one becomes a Christian, he becomes a member of the family of God, the spiritual kingdom of God and member of the body of Christ. Meaning, no one is a member of the body of Christ who is not a member of a local church. The local church is the body of Christ, and vice versa.
The body is a unit, though it is made up of many parts; and though all its parts are many, they form one body. So it is with Christ. For we were all baptized by one Spirit into one body; whether Jews or Greeks, slave or free-and we were all given the one Spirit to drink. (1 Corinthians 12:12-13)
It is composed of people of all sexes, races, nations, cultures and social classes. There is no division or distinction in the body of Christ between Jew, Gentile, Slave or Free, Male or Female. All are one in Christ.
The church began on the day of Pentecost as a living organism that’s united forever with Christ, with the coming of the Holy Spirit in its new work of sealing and permanently indwelling believers.
The Church is the body of Christ; it belongs to him and is an intimate part of him.
In any case, the Church belongs to Christ and not to man according to Matthew 16:18; He is described as its head (Ephesians 1:20-23) and requires accountability from church leaders. He gave the church gifts for specific services(Ephesians 4:8-11), and he is preparing the Church to become His bride without blot or blemish (Ephesians 5:26-27).