Bluelion, I would like to remind you in a friendly manner that the congregational forums (such as this OO forum, or the main/non-debate EO forum, or the RC forum, etc.) are to be debate-free zones wherein visitors from outside of the churches in question are requested to not teach against the beliefs of the church(es) represented by the congregational forum. So our ecclesiology is not something to be taught against in this or any thread. Questions are fine, but statements such as "that's not what God says" that place our ecclesiology in opposition to God are not. Orthodox ecclesiology, like every aspect of our faith, is something to be learned, and in that learning, meant to illuminate the soul rather than to cause arguments.
With that basic parameter in place, I am so glad that you have brought up the Revelation. I am not sure about my friend wgw's Syriac Orthodox Church, but my own Coptic Orthodox Church -- in contradistinction to the Eastern Orthodox Church -- actually reads the entire book of Revelation aloud during the Holy Week services, on a night we call "Abu Ghalimsees" (an Arabic corruption of the Greek "Apocalypsis", meaning Apocalypse). When we reach the section dealing with the Holy Spirit's sayings to the churches, the people's refrain (to be said at places where the main chanter pauses) is "He who has ears let him hear what the Spirit says unto the churche
s". So it is obvious from this service that we do indeed recognize that other churches exist. But the lesson here is instructive: Each of the churches spoken to has a specific malady, and a specific remedy given to her by God, so that if we listen to (hear) what the Spirit says to each one, we will know the remedy for these weaknesses that are to be guarded against by every church in every age. (For a Coptic treatment of Revelation, you may read Fr. Tadros Yacoub Malaty's book on the subject and investigate the Patristic quotes given there:
Fr. Tadros Y. Malaty Commentary on the Book of Revelation [opens as a pdf].)
It is not enough to simply recognize that there are other churches which are not the Orthodox Church. We do that already. But we also maintain that the Orthodox Church is uniquely faithful throughout history and into eternity in ways that other bodies claiming to be the Church are not. It is important to understand here that this is not to the credit of any Orthodox Christian. You have written that "those who have Jesus living inside them are the True Church of Jesus or Body of Christ", and this is something that I cannot imagine any Orthodox Christian ever disagreeing with. We simply believe that the believers have congregated throughout time in communion as particular churches found in specific places among particular people. This is something that is also borne out of a simple reading of Revelation (and elsewhere), too.

You have probably noticed that the Pauline letters, for instance, are often written to particular groups of people: "The Letter of St. Paul to the Corinthians", "The Letter of St. Paul to the Romans", etc. Corinth, Rome, Philippi, etc. are all geographical locations, and Paul's letters are addressed to the church as it is gathered at those locations.
We continue on in this very early model not due to politics (after all, the world was not politically divided up as it is now ~2000 years ago), but because we have preserved a very early way of being Christian which includes this 1st century understanding of the church as having a physical reality in the form of people assembled together in particular places. Similarly, we chant in old languages (sometimes), we preserve old practices (all the time), and we carry on the faith that was given once and for all to the saints (for all time) not for the sake of declaring others to be worse off than we, but because this is the essence of what it means to be Orthodox, and not some other kind of Christian. As my own priest is fond of saying about other Christians, "Yes, of course they are Christians, and we love them; but they are not Orthodox unless they are Orthodox." (Highlighting, I suppose, that there is something additional expected of Orthodox Christians above and beyond agreed upon individual points with any particular non-Orthodox group or individual. So we may actually find that we agree on lots of things but still remain out of communion because of comparatively fewer things than what we agree on, as is the case with regard to our relationship to the more well-known Eastern Orthodox.)
I hope that helps to clarify things and gives you some things to think about. Please let me know if you have any questions.