Gilles Quispel said this quote

John has a narrow mind. For him, neither the beauty nor the prosperity of the city of Ephesus is worth a second glance. Ephesus was situated at the end of the Silk Road from China and the caravan route from India which used to pass through the Parthian Empire en route to the West. But the prophet is quite unaware that this particular world exists at all. Even culture means absolutely nothing to him; for example, in 18:22 he rejoices that not only song but also the sound of the flute have disappeared. The world which he knows is limited to the seven churches whose Christianity corresponded with his own; and that in but a single province of the Roman Empire, namely Asia. As to the rest, he is only familiar with the mother church in Jerusalem and the sister church in Rome.John is utterly obsessed by Rome. The fact that this particular metropolis had bestowed both law and peace upon no less than one-half of the world never got through to him at all. He is also quite oblivious of the fact that Rome oppresses nations and exploits slaves. He could not care less about national or social considerations. He abominates the whore on the seven hills simply because Rome is persecuting Christians. This is precisely what the Apocalypse is all about: innocent suffering.