I'll leave this little tidbit from St. Gregory of Nyssa:
"The whole city [of Constantinople] is full of [arguments about Theology], the squares, the market places, the cross-roads, the alleyways; old-clothes men, money changers, food sellers: they are all busy arguing. If you ask someone to give you change, he philosophizes about the Begotten and the Unbegotten; if you inquire about the price of a loaf, you are told by way of reply that the Father is greater and the Son inferior; if you ask 'Is my bath ready?' the attendant answers that the Son was made out of nothing."
The Church and religion were an intrinsical part of the Eastern Roman Empire. To be Greek was to be Roman was to be (Orthodox) Christian. Separating any of those concepts from the other would require the fall of the empire and the rise of secularization, and it's still an incomplete process to this day[...]
[...]There is a story, possibly apocryphal, possibly not, of a Byzantine Emperor who professed some small liturgical heresy, a belief that erred, however so slightly, from the canon of the Church.
The mob that formed upon hearing of this stormed the Imperial Palace, overwhelming the Varangian Guard. They murdered the Emperor's entire family, then dragged him to the Haga Sophia. There they castrated him, blinded him, and slit his nose open, before tying him to a throne in the center of the cathedral, on the very dias upon which he had been crowned. He choked to death on his own blood over the course of hours.
Crowns, gold, wealth and power; in the City of Constantine, all these pale before the might of the Cross.