The problem with the statement that Christ and the Church are one, is the question: which church is being referred to, seeing that the visible Church is split up into many different denominations.l
So, which one? Is it:
Roman Catholic
Anglican
Baptist
Vineyard
AOG
Lutheran
Presbyterian,
to cite some examples?
Each of these sincerely believe that they are the church that is closest to God and at the cutting edge of His will.
With invisible church ecclesiology, you just assert that Christ is the head of the invisible Church comprised of all Christians who adhere to doctrines contained in the Nicene Creed such as the Trinity and certain other essential beliefs, which are basically those outlined in the ChristianForums.com Statement of Faith, which is an extremely good document because it starts with the Nicene Creed and tacks on a few useful responses to modern errors, for example the denial of the Apostolate of St. Paul, which has become in recent years an increasingly popular heresy, and because these beliefs are deemed essential for normative Christianity, separating the wheat of Anglicanism, Orthodoxy, Roman Catholicism, Lutheranism, Presbyterianism, Baptism, and other denominations (I don’t know much about the Vineyard or AOG so cannot attest if they fit the bill, but I would assume they do, since those denominations which do not are generally regarded as cults, for example, the J/Ws, Christian Science, the Mormons, etc.
Speaking of Mormons and cults, I am in southern Utah today for medical reasons and saw at the grocery store a pair of women dressed in the distinctive 1950s hairstyle and clothing required of members of the polygamist FLDS cult in nearby Colorado City, Arizona, which is still run by Warren Jeffs from prison, where he is serving a life sentence for the abuse of children. I prayed for them and it was an extremely sorry sight, and we must pray God delivers those women from the slavery in which they live.
Thus, when we look at a cult such as that or even the mainstream Mormons and compare it with any authentic Christian church, one can readily discern the distinctions, and these represent the authority of the Church by virtue of being accepted ecumenically and being a requirement of an apostolic catholicity, that is, the whole faith handed down from the Apostles, in an invisible church ecclesiology.
In a sense, this also means that the early Church in such an ecclesiology has more authority than the divided churches of today, alienated by schism, but this is also the case if one adheres to any form of Eastern or Oriental Orthodox, Assyrian, Anglican, Lutheran or Roman Catholic ecclesiology, since in those denominations you have Tradition and the Creeds as important parts of the faith, and these originated in the Early Church.