"For the testimony of Jesus is the spirit of prophecy" (Revelation 19:10). Prophecy is a gift of the Holy Spirit. Jesus was anointed with the Holy Spirit as the Prophet, Priest and King. Both words Messiah and Christ mean anointed one. Jesus is the Prophet that Moses said would come (Deuteronomy 18:15). His coming is prophesied many times in the Old Testament.
In the book of Revelation, prophecy is the testimony of Jesus. That prophetic book is from Jesus and about Jesus. The apostle John was instructed to write what he saw and heard. In Revelation, chapters 19 and 20, we read about the second coming of Christ and the events which follow. Jesus said, "Surely, I am coming quickly" (Revelation 22:20). That means it will be sudden when he comes, rather than immediately.
The book of Revelation is about Jesus Christ. He is the Revelation. "Behold, He is coming with clouds, and every eye shall see Him, even they who pierced Him. And all the tribes of earth shall mourn because of Him. Even so, Amen" (Revelation 1:7). Those who have rejected the Gospel of Christ will be terrified. The day of their judgment has come (Revelation 20:11-15).
The last sentence in the book of Revelation tells us how to be saved and sure. It's by grace alone. Grace is the gift of God in Christ alone. It is by faith alone that we receive the grace of Christ. "For by grace you have been saved through faith, and that not of yourselves, it is the gift of God" (Ephesians 2:8). So, the book of Revelation ends with these words. "The grace of our Lord Jesus Christ be with you all. Amen" (Revelation 22:21).
