The Church is one. The Church is Christ's mystical body; just as he cannot be divided, neither can his body. There is one Church, not many; and it is united, not divided. This may seem naïve or callous given the present realities of Christians separated for nearly a thousand years. In the face of this real division, modern men are tempted to despair and speak of a "divided Church," abandoning the creedal faith. (OrthodoxWiki)