Revelation 12:7-9
And there was war in heaven. Michael and his angels fought against the dragon, and the dragon and his angels fought back. But he was not strong enough, and they lost their place in heaven. The great dragon was hurled down--that ancient serpent called the devil, or Satan, who leads the whole world astray. He was hurled to the earth, and his angels with him.
God always challenges the Devil to test spiritual strength and the Devil has never won any of the tests.The Devil will boast of the size he has through his children or minions but he always loses the fight in the end. Let's go through some records in the past, one by one, as a reminder to the Devil and his children. First record is definitely in heaven, as reminded in the passage above. God doesn't have to fight directly with the Devil. He never does that. He doesn't have to because the Devil is no match to Him in power. In the passage above, the Devil and all the evil angels that followed him in that evil rebellion against the LORD had to fight with one of God's powerful angels. Michael led one group of God's angels to fight the Devil who is referred to as the great dragon here. He is a great serpent. You see the Devil is the one who likes to divide a family, community, nation or God's creation in short. There was no division in heaven before Lucifer became the great dragon. He is the cause for all the divisions, factions, dissensions, sects, races, systems and in short everyone on Earth now. There were divisions among the angels of God in heaven because of this evil, great dragon. He considers himself 'great' but we see here in the passage above that he isn't that 'great' as he claims to be. There was actual fight, actual war, but the 'great' dragon wasn't even as strong as Michael the angel of the LORD, what more the LORD. He was no match for Michael even. "He was not strong enough for Michael" the word of God says. So, the first lesson we learn here is, do not believe it when someone boasts that he or she is great. They could be proven to be the weakest, even without God interfering in the fight or war. Clearly, that was the case here! Because the Devil and the angels that followed him were not strong enough for Michael and his small group of the angels of the LORD, he and the evil angels with him lost their place in heaven. Initially, they had a place in heaven but now and forevermore they don't. That war decided it. Now, because he and the evil angels had lost their place in heaven, they were hurled to the Earth. Now wait a minute, is this why God wants to destroy the present Earth and the heavens? Is it because of the filth that the Devil brings along with him wherever he goes. He leads the whole world now astray with his filthy sinful nature. The easily deceived Adam and Eve bought his filth thrown at them. How foolishly vulnerable were they? They were disobedient to the LORD even when He had warned them strictly not to take upon themselves the sinful nature of the Devil into them. They thought they knew what was good for themselves, actually, they didn't. They were easily deceived! The Devil thought that he had won over the LORD by successfully deceiving Adam and Eve to his evil side. He was pronounced with the 'biggest fight ever' in Genesis 3:15. He is to meet the Greatest. The Devil is to be publicly made a spectacle of eternal condemnation before all the angels and human beings. The Greatest is the Son of God Himself. He will appear to destroy all the works of the Devil on this Earth too. He will take the form of flesh as a human being and it was prophesied as early as in this verse; Genesis 3:15. this was just the second test of strength. The devil and his evil angels were doomed with this first prophecy that came from the mouth of the LORD Himself.
Genesis 3:15
And I will put enmity between you and the woman, and between your offspring and hers; he will crush your head, and you will strike his heel."