The devil has not yet been thrown out of heaven.
In the book of revelation 12:7-9 we are told that there was war in heaven where Michael and his angels fought against the devil and his angels and the devil was defeated and was thrown down into the earth.Do you know that this war has not yet be fought? In revelation 1:1 it says that John was shown things that must "shortly come to pass".That means that contrary to the popular belief that the devil sinned and was cast out before the world was created,by the time that John was given the book of Revelation,he had not been cast out.In Revelation 12:10-11 the bible says that the devil accused the saints and that they overcame him by the blood of the lamb.This part shows that the devil must have still in heaven and he accused us before God and we overcame him,hence the devil will be cast out in the future.In John 12:31, the bible says that"now is the judgement of this world: now shall the prince of this world be cast out." Also in John 14:30, the bible says "hereafter I will not talk much with you: for the prince of this world 'comes', and has nothing in me". All this scriptures shows that the Devil has not yet been thrown out of his offices in heaven.