Rev 1:9
9 ¶ 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.
9 ¶ I John, who also am your brother, and companion in tribulation,
and in the kingdom and patience of Jesus Christ,
There are two things listed that John is: Brother and companion in tribulation, and two things where he is: Kingdom and the patience.
We may say that he is our brother in the kingdom and our companion in tribulation in the patience of Christ.
Ro 5:3 And not only so, but we glory in tribulations also: knowing that tribulation worketh patience;
Our tribulation is due to Christ's patience:
2Pe 3:9 The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us–ward, not willing that any should perish, but that all should come to repentance.
was in the isle that is called Patmos, John is setting the stage to share a type of conversion experience by drawing our attention to Noah's ark, Moses ark, and the ark of the covenant. Patmos means "my killing" . He could have said he was on Patmos, without drawing attention to the fact that it was an island. But the word for island is word play for ship since it shares the same root. He was on the ship of his death.
The ark is a symbol of the cross. The cross is not the end of the story, it is the beginning of life. It is the marriage which is a promise of fruitfulness. John, by walking in the spirit, saw a picture of Christ being painted in his own circumstances and is consciously sharing it with us. While he was in his ark, he had a type of conversion experience, not of salvation since that had been accomplished already, but of understanding. The result coming out of the ark is fruitfulness.
for the word of God, and for the testimony of Jesus Christ. The Word of God is Christ, how does his testimony differ? Testimony comes from the word martyr. He was there to die for Christ and intentionally draw a picture of Christ with his life. He is saying that he will be more fruitful in death than he was in life, as Christ was desolate in life and fruitful in resurrection.
Considering that every Christian knows John 3:16, we might very well say that more people have come to Christ through his writings than through his works before his death.