What the Bible says about the book of the Revelation which John was commissioned to write:

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The Revelation of Jesus Christ, which God gave Him to show to His bond-servants, the things which must soon come to be; and He sent and signified by His messenger to His bond-servant John… (Revelation 1:1)

Happy is the one who reads aloud and those who hear the words of this prophecy and treat as valuable what is written in it, for it is the season. (Revelation 1:3)

“Therefore write the things which you have seen, and the things which are, and the things which will come to be after these things.” (Revelation 1:19)

“Behold! I am coming…Happy is the one who treats as valuable the words of the prophecy of this book.” (Revelation 22:7)

“Do not seal up the words of the prophecy of this book, for the time is near.” (Revelation 22:10)

“I, Jesus, have sent My messenger to testify to you these things…” (Revelation 22:16)