In fact, he refers to himself in every chapter of the book of Revelation, except in chapters two and three which the author has already indicated he wrote. In the last chapter, Revelation 22:8, John uses his name once again.
The testimony of the early church fathers strongly supports the view that the apostle John is the author of the book of Revelation. He goes on to say, John, one of the apostles of Christ, who prophesied, by a revelation that was made to him, that those who are in our Christ would dwell a thousand years in Jerusalem . .John Walvoord makes this statement about the authorship of Revelation, The arguments for rejecting the apostolic authorship stem largely from the theological climate of the third century.
At that time the Alexandrian School of Theology, including Dionysius, opposed the doctrine of the millennial kingdom which is plainly taught in chapter 20 with its reference to the thousand years. The substantiating evidence for any other author than John the Apostle, however, is almost entirely lacking.
The external evidences can only support what is internal.
The external can never override the internal truth.
Then in chapters two and three of the book of Revelation, the names of the seven churches are given and a message is given to them.
This clearly reveals that the person identified as “John” is the author of the book.
In like manner, Tertullian cites the author as “the Apostle John” and quotes from almost every chapter of the book. As for the letters of Paul, they themselves show those who wish to understand from which place and for which cause they were directed.
Hippolytus quotes extensively from chapters 17 and 18, attributing them to John the Apostle. 69-155) refers to the Fragment himself. The Fragment is important since it recognizes most of the books of the New Testament and mentions their authors. First of all [he wrote] to the Corinthians forbidding schisms and heresies; then to the Galatians [forbidding] circumcision; to the Romans he wrote at greater length about the order of the scriptures and also insisting that Christ was their primary theme.
When you read Revelation, nowhere in the book does it state that John is in exile or imprisoned. I am a missionary, and I will be going to Brazil in July for the Gospel.
If someone were to call me from America and ask what I was doing in Brazil and I stated that I was there for the Gospel, should they conclude that I was there to be punished for the Gospel? The tradition of John's exile was started by Augustine about 200 years after John lived.