Who bore witness of the word of God, and of the testimony of Jesus Christ, and of all things that he saw.
All Commentaries on Revelation 1:2 Go To Revelation 1
Bede
AD 735
Testimony. That you may not doubt of the person of John, he is the same who gave testimony to the eternal Word of God incarnate, according as he saw, saying, "Whose glory we saw, the glory as of the only-begotten of the Father [Jn. 1:14]."