from: “The Addresses to the Seven Churches” by Hamilton Smith (unedited)
In order to rightly interpret the address to Thyatira, and the addresses that follow, it is important to see the characteristic differences between the first three addresses and the last four.
It is clear that the first three
Churches set forth the condition of the whole professing Church at three
successive periods of its history. Moreover, the general condition set forth by
these Churches does not continue throughout the Church's history; though,
indeed, the evils that develop, during the periods set forth by these Churches,
continue to mark the Christian profession for all time.
Thus the united testimony of the Church that marked the Ephesian period has passed away; though the loss of first love has ever since marked the Christian profession.