All of those Churches were part of the diocese of Ephesus, a diocese of the Catholic Church, of which John was the bishop. BTW, every diocese is "a Church" entity, and what ties them to the Catholic Church is their communion with the Bishop of Rome. And it's always been that way.
Christ refers to himself as the bridegroom...
He that hath the bride is the bridegroom: but the friend of the bridegroom (referring to John the Baptist), which standeth and heareth him, rejoiceth greatly because of the bridegroom's voice: this my joy therefore is fulfilled. - John 3:29
And Christ will merry seven wives...
1. Ephesus Apostolic Leaving the first love All they which are in Asia be turned away from me II Tim 1:15
2. Smyrna Martyrs Persecutions ten days Foxes Book of Martyrs describes ten Roman persecutions.
3. Pergamos Orthodox A pyrgos is a fortified structure Needed for the dark ages.
4. Thyatira Catholic The Spirit of Jezebel is to persecute, control, and to dominate. This spirit can invade any church!
5. Sardis Protestant A sardius is a gem, elegant yet hard and rigid. Doctrine in the head, little in the heart.
6. Philadelphia Methodist To obtain sanctification was to do so with love.
7. Laodicea Charismatic Rich and increased with goods and have need of nothing?
So I liken the Catholic church to a 'she.' And Jezebel also as a 'she.' The Catholic church in her time was very much a 'she.' You would not have wanted to have spoken out against 'her' in her glory days! There were great institutions set up in those days to get the heretics against 'her' to recant!
As far as the Catholic church, I believe that it is a Christian church and its members are saved. But I have no desire to join 'her.'
In 1552 William Gardiner was executed while in Portugal where he was trussed up and lowered into the flames - an especially slow and painful death. The Scottish martyrs were possibly better treated in that their death was aided by tying bags of gunpowder to the body and a cord tied round the neck. The cord about the neck was originally intended, by Catholic doctrine, to throttle the prisoner before burning but it seemed to become more of a means of shutting off the the dying words and perhaps the screams of burning.
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