“Who bare record of the word of God, and of the testimonie of Iesus Christ, and of all things that he saw.”
1611 King James Version (KJV)
1:2 Who hath testified - In the following book. The word of God - Given directly by God. And the testimony of Jesus - Which he hath left us, as the faithful and true witness. Whatsoever things he saw - In such a manner as was a full confirmation of the divine original of this book.
Re 1:2 Who bare record. John is meant, who made the record of all he saw and heard.