The Key to understanding the Book of Revelation is found in Chapter 1:19. John is told; “Write the things that you have seen (The past; Chapter 1), the things which are (The present time in which John lived Chapters 2 & 3), and the things which will take place after this (The future; Chapters 4-22).”
Chapter 1 reveals Jesus, and His relationship with His Bride, the Church. Chap. 2 & 3 reveals Jesus’ messages to His Church. Chap. 5 reveals Jesus’ redemption of the world in opening the seals. Chap. 6-18 reveals Jesus (the Lamb) pouring out His wrath & purging the earth before His 2nd coming. Chap. 19 reveals Jesus with His Bride in the Kingdom age & His victory over His enemies. Chap.20 Reveals Jesus, the Judge, on the Great White Throne. And Chap.21-22 reveals Jesus & His Bride and the eternal ages to come.