The Unity of the Church
A. The church finds its unifying principle in the covenant promise “my dwelling place will be with them; I will be their God, and they will be my people” (Ezek. 37:27, Lev. 26:12). This finds fulfillment in Jesus as Emmanuel (“God with us,” Matt. 1:23, Jn. 1:14), who came as the mediator of the covenant of grace to redeem and purchase this people for his dwelling by his blood. The ultimate consummation of the promise is the new Jerusalem, the Bride of Christ (Rev. 21:3).
B. The church must recognize, appreciate, and confess this fundamental unity of the covenant people of God, the body of Christ; which is a God-given creation and not a human achievement.
C. The church, the visible organization, is described in the Bible as one church. God has given only one covenant of love (Deut. 7:6-12) and has only one people of the covenant.
D. In the New Testament this teaching of the unity of the people of God is sustained (see Eph. 2:11-22 and 4:1-16). Yet the situation is different. No longer are the people of God circumscribed by ethnic, political, or geographical boundaries. All nations are to be discipled.
E. This unity includes those people of God in past ages and also looks to the future and includes the people of God who will believe on his name (Jn. 17:20-21).
E. The Lord governs his church also through the application of his Word to the people by the Spirit as the Word is expounded and applied by the officers of the church (Eph. 4:11-16).
F. The gospel proclaimed by the apostles as the foundation of the church resulted in establishing churches as covenant communities in various locations, churches which were ruled by elders. These churches and these elders were not independent, but were one body united by Christ their head, by the abiding presence of the Holy Spirit, and by the covenant promise of God. The elders at Antioch and Jerusalem resolve a problem, under God, and their decision is binding on the churches (Acts 15, 16:4).
G. The unity of the church is attained unto by growing in spiritual maturity (Eph. 4:13). Unity and maturity are the result of mutual, loving admonition and joint submission to Scripture. Such maturity is manifested by speaking and acting the truth in love (Eph. 4:15).
H. Each member is essential to the body, and the growth of the body depends on the active participation of each part (Eph. 4:13, 16). The work of the officers of the church is to prepare the members for, and assist them in this work (Eph. 4:11-12).
(.opc)
Course this is according to the Orthodox sight above, may not be “official” since no unity exists, and who seem to suggest here Unity/Communion is some strange idea of Rome.