Archimandrite George of St. Gregorios: Theosis in the Church

Those who wish to unite with Jesus Christ, and, through Christ, with God the Father, recognise that this union is realised in the body of Christ, which is our Holy Orthodox Church. Of course, this Union is not with the Divine essence, but with the deified human nature of Christ. But this union with Christ is not external, nor is it simply moral.
We are not followers of Christ in the way that one might perhaps follow a philosopher or a teacher. We are members of Christ's body, the Church. The Church is the body of Christ, the real body, not a moral one, as some mistaken theologians have written, not having looked deeply enough into the spirit of the Holy Church. Despite our unworthiness and sinfulness, Christ takes us Christians and incorporates us into His body. He makes us members of Himself. We become real members of Christ, not just followers of a code of morality. As the Apostle Paul puts it, "We are members of His body, of His flesh, and of His bones" (Ephesians 5:30).
+Archimandrite George of St. Gregorios, from Theosis: The True Purpose of Human Life, The Church: The Place of Man's Theosis