“I John, who also am your brother, and companion in tribulation, and in the kingdom and patience of Jesus Christ, was in the isle that is called Patmos, for the word of God, and for the testimony of Jesus Christ.”
King James Version (KJV)
1:9 I John - The instruction and preparation of the apostle for the work are described from the ninth to the twentieth verse. #Rev 1:9 |- 20 Your brother - In the common faith. And companion in the affliction - For the same persecution which carried him to Patmos drove them into Asia. This book peculiarly belongs to those who are under the cross. It was given to a banished man; and men in affliction understand and relish it most. Accordingly, it was little esteemed by the Asiatic church, after the time of Constantine; but highly valued by all the African churches, as it has been since by all the persecuted children of God. In the affliction, and kingdom and patience of Jesus - The kingdom stands in the midst. It is chiefly under various afflictions that faith obtains its part in the kingdom; and whosoever is a partaker of this kingdom is not afraid to suffer for Jesus, #2Tim 2:12|. I was in the island Patmos - In the reign of Domitian and of Nerva. And there he saw and wrote all that follows. It was a place peculiarly proper for these visions. He had over against him, at a small distance, Asia and the seven churches; going on eastward, Jerusalem and the land of Canaan; and beyond this, Antioch, yea, the whole continent of Asia. To the west, he had Rome, Italy, and all Europe, swimming, as it were, in the sea; to the south, Alexandria and the Nile with its outlets, Egypt, and all Africa; and to the north, what was afterwards called Constantinople, on the straits between Europe and Asia. So he had all the three parts of the world which were then known, with all Christendom, as it were, before his eyes; a large theatre for all the various scenes which were to pass before him: as if this island had been made principally for this end, to serve as an observatory for the apostle. For preaching the word of God he was banished thither, and for the testimony of Jesus - For testifying that he is the Christ.
Re 1:9 I John. He here names himself for the third time. The fourth and fifth times are in Re 21:2 22:8. Companion in tribulation. A partaker of the sufferings of the church like you. Kingdom and patience. In the kingdom they were called to patient endurance. Was in the isle that is called Patmos. For description of this island, see Topic 9307. "Bible Commentary (Speaker's)" on Revelation states: ``It appears to be the certain result of historical evidence that the Apostle John was banished to the island of Patmos during the reign of Domitian (A.D. 81-96) and in the fourteenth year of that reign, and was recalled from Patmos to Ephesus by the Emperor Nerva in A.D. 96.'' For the word of God. Banished on account of preaching the word of God.