Revelation 1:2-3 ESV
who testifies to everything he saw—that is, the word of God and the testimony of Jesus Christ. Blessed is the one who reads aloud the words of this prophecy, and blessed are those who hear it and take to heart what is written in it, because the time is near.
John had the perspective of one who had witnessed the incarnation of God and rested his head on the breast of Jesus. As the beloved disciple his testimony is unique, for he was granted the privilege of an honored place in his witness of Jesus the man and now is granted a vision that he alone of the disciples would experience. No wonder he would refer to himself as the beloved disciple.
The phrase "word of God and the testimony of Jesus Christ" refers to the same thing. Both the word and testimony refer to the truth of God. The Father and Son are one and there is but one God.
We are blessed in the reading and hearing of this prophesy. That should be enough said to spend time in this book. This came from God with the specific purpose of preparing us for the days to come. We receive warnings, encouragement, an overview of the times between His comings, and assurance that what God has promised will be fulfilled.
Taking this message to heart means letting the word take root in the soil of our earth, to make this word our own, to connect with its meaning in such a way as to change our life. This is true of all the words and testimony contained in Scripture and is certainly true of this book. It is written that we would know.
The time is near and the day of The Lord comes closer with each passing day. There is no additional covenant to be added in God's plan. The word is spoken and it only remains to come to pass. It endures forever.
The man who saw it has given testimony, and his testimony is true. He knows that he tells the truth, and he testifies so that you also may believe.
This is the disciple who testifies to these things and who wrote them down. We know that his testimony is true.
Jesus did many other things as well. If every one of them were written down, I suppose that even the whole world would not have room for the books that would be written.
Very truly I tell you, we speak of what we know, and we testify to what we have seen, but still you people do not accept our testimony. I have spoken to you of earthly things and you do not believe; how then will you believe if I speak of heavenly things?