The Book of Revelation of Jesus Christ was written to reveal things about Jesus Christ. The word revelation is an extension of the word reveal. It comes from the Greek word apocalypse. Apocalypse does not mean the complete destruction of the world or cataclysm. It means an unveiling; to uncloak and make visible. This is very similar to, for example, when a civic center has a statue underneath a blanket to be taken off at a certain time to show (reveal to) its’ citizens. There is an unveiling of what’s underneath.
The Book of Revelation is about; revealing, unveiling, making visible the things about Jesus Christ, not apocalypse in the sense of cataclysms. If the book’s main theme was cataclysms, then that would be the climax of the book but it is not — Heavenly Jerusalem is.
It is interesting that through the Book of “The Revelation of Jesus Christ”, the conclusion of the matter is Heavenly Jerusalem. Heavenly Jerusalem is the theme and the object of the book, not destruction. Just as scripture starts off explaining things in contrasts, so too, does the book of “The Revelation of Jesus Christ”, but instead of contrasting light and dark, it details the contrasts of the beast and the Bride.