For a far more serious and exhaustive discussion of ecclesiology in the early Church I suggest...
EUCHARIST, BISHOP, CHURCH: THE UNITY OF THE CHURCH IN THE DIVINE EUCHARIST AND THE BISHOP DURING THE FIRST THREE CENTURIES by Met. Iakovos (John) Zizioulas, one of the foremost living theologians in the world. He has also been a close friend of many decades with Pope (E) Benedict XVI.
http://www.oodegr.co/english/biblia/episkopos1/perieh.htm
I posted this as a separate thread a while back. Sadly, of those who rack up the most posts in FR’s endless supply of low wattage inter-confessional flame war threads, few seem to have any interest in actually reading something that is really serious and or more than a page or two in length.
+John is truly a “Thoro tou Theou”, a Gift of God to The Church and his friendship with +BXVI undoubtedly one of the most important ecclesiastical pairings of the past two or three hundred years at least.