Therefore write down the things you have seen, the things that are, and the things that will happen after this.
John is commanded to write what he has seen, what is, and what will happen after this.
This verse states the broad scope of the entire book.
9I, John, your brother and partner in the tribulation and kingdom and perseverance that are in Jesus, was on the island of Patmos because of the word of God and my testimony about Jesus. 10On the Lord’s day I was in the Spirit, and I heard behind me a loud voice like a trumpet, 11saying, “Write on a scroll what you see and send it to the seven churches: to Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia, and Laodicea.” 12Then I turned to see the voice that was speaking with me. And having turned, I saw seven golden lampstands, 13and among the lampstands was One like the Son of Man, dressed in a long robe, with a golden sash around His chest. 14The hair of His head was white like wool, as white as snow, and His eyes were like a blazing fire. 15His feet were like polished bronze refined in a furnace, and His voice was like the roar of many waters. 16He held in His right hand seven stars, and a sharp double-edged sword came from His mouth. His face was like the sun shining at its brightest. 17When I saw Him, I fell at His feet like a dead man. But He placed His right hand on me and said, “Do not be afraid. I am the First and the Last, 18the Living One. I was dead, and behold, now I am alive forever and ever! And I hold the keys of Death and of Hades. 19Therefore write down the things you have seen, the things that are, and the things that will happen after this. 20This is the mystery of the seven stars you saw in My right hand and of the seven golden lampstands: The seven stars are the angels of the seven churches, and the seven lampstands are the seven churches.[’’]