The Church as described in [Ephesians 4, 5] cannot possibly be more than ONE Church! “One Church One Faith One Baptism” The Church was created the day of Pentecost 2000 years ago with special CANONS (rules) delivered to the Apostles that include the WILL of God for the Salvation of ALL mankind!
Cannons of the Apostles http://www.holytrinitymission.org/books/english/cannons_apostles_rudder.htm
The Greed (The Symbol of Faith) written in 381 AD during the 2nd Church Ecumenical Synod by those who succeed the Apostles is very clear.. “We believe in ONE, Holy, Catholic (Universal) and Apostolic Church. Outside the ~One Church~ created by the Holy Spirit the day of Pentecost there cannot be Salvation/Theosis because Lord Jesus cannot possibly be present in any other church as High Priest and Mediator to His Father in the absence of the canons delivered by the holy Spirit for the Salvation of man the day of Pentecost.
A Word About Church History
Scholars estimate there are over 2600 groups today who lay claim to being the Church, or at least the direct descendants of the Church described in the New Testament. Repeat: 2600! But for the first thousand years of her history the Church was essentially one. Five historic Patriarchal centers Jerusalem; Antioch, Rome, Alexandria, and Constantinople formed a cohesive whole and were in full communion with each other. There were occasional heretical or schismatic groups going their own way, to be sure; but the Church was unified until the 11th century. Then, in events culminating in A.D.1054, the Roman Patriarch pulled away from the other four, pursuing his long-developing claim of universal headship of the Church in violation of [Ephesians 4:5] that specifically points out ONE CHURCH for the Salvation of man. Today, nearly a thousand years later, the other four Patriarchates remain intact, in full communion, maintaining that the Greek Orthodox apostolic faith of the inspired New Testament record which is the Orthodox Church and her history as described herein, from Pentecost to the present day.
Mount Sinai where Moses got the Ten Commandments is an Greek Orthodox Monasteryhttps://en.wikipedia.org/wiki/Saint_Catherine%27s_Monastery
The cave of the Apocalypse (Orthodox Divine Liturgy takes place there twice a day)!
Constantinos James Wiliams