The Revelation of Jesus Christ, which God gave Him to show His servants—things which must shortly take place. And He sent and signified it by His angel to His servant John, 2 who bore witness to the word of God, and to the testimony of Jesus Christ, to all things that he saw.
The original readers of this book would have seen this book as a comfort during a tremendously difficult time. They would have taken it as a call to a Holy and blameless life just like in 2 Peter 38-14. It would have been a reassurance knowing that Jesus was coming back and that they have the ultimate victory.
We need to remember that Revelation is a book of prophecy, and that prophecy is always clear AFTER it’s fulfilment. We will not fully understand until after the events! (Just as with Jesus 1st coming!!). Therefore it is not wise to build doctrine on literal interpretation of apocalyptic literature, or on something mentioned once in the bible.
However we can rest assured that this is the end. This world that we are in is temporary it will fall away. Through God’s unbreakable and fully complete love, sin and death have been defeated.
Satan, the enemy has lost, and is overcome through the death and resurrection of Jesus.
No matter what we face in this life we can overcome any and all adversary.
We also have hope, because Jesus IS coming back.