The early churches were loosely associated together and formed connections through their bishops in a common acceptance of the faith of the apostles and disciples who brought them the missionary faith. We do form intercommunion relationships with other jurisdictions only if we share the faith. The eastern and western churches may be seen as the human brain itself is which God has divided into two hemispheres. Together they make up the head consciousness. We are all a part of the mystical body and are still assured of God's loving care and protection no matter to which side we belong.
Some people are right handed, others left handed, some are ambidexterous.
The diversity is truly of God's multiplicity in a faith oriented abundance. Each jurisdiction according to geography has certain customs which characterize them. We cannot say that we exhibit the same praxis as that found in the middle east, the orient or even in the balkans, but we are have an ortho-praxis in utilizing the same things which other jurisdictions use with differences according the ekonomia of our bishops and synod. Those who are blind and given sight, often fall upon their knees in thanksgiving to God for their former condition. He is not deterred by sin or the devil or by human wilfullness or pride.