Revelation 12:8

8 but the dragon was defeated, and he and his angels were not allowed to stay in heaven any longer.

Revelation 12:8 Meaning and Commentary

Revelation 12:8

And prevailed not
That is, the dragon, or the devil, and his angels, prevailed not against Michael and his angels; but, on the other hand, were conquered by them, as the above tyrants were by Constantine and Theodosius: some copies read in the singular number, "and he prevailed not", as the Alexandrian copy, the Complutensian edition the Arabic and Ethiopic versions; and other copies in the plural number, "they prevailed not": and as the Vulgate Latin and Syriac versions:

neither was their place found any more in heaven;
in the Roman empire; or "his place", as some copies and versions: this was the time of the judgment of the world, or of the empire as Pagan; Satan the prince of the world, who had long governed in it, was now cast out of all power and authority in it, and all the idol gods in whom he was worshipped, with all the idolatrous priests; nor were there any more any Heathen emperors, for after Constantine's time there was only Julian the apostate, and who reigned but a little while; and after Theodosius, who cleared the empire of Paganism, there never was any, and there is reason to believe there never will be.

Revelation 12:8 In-Context

6 The woman fled to the desert, to a place God had prepared for her, where she will be taken care of for 1,260 days.
7 Then war broke out in heaven. Michael and his angels fought against the dragon, who fought back with his angels;
8 but the dragon was defeated, and he and his angels were not allowed to stay in heaven any longer.
9 The huge dragon was thrown out - that ancient serpent, named the Devil, or Satan, that deceived the whole world. He was thrown down to earth, and all his angels with him.
10 Then I heard a loud voice in heaven saying, "Now God's salvation has come! Now God has shown his power as King! Now his Messiah has shown his authority! For the one who stood before our God and accused believers day and night has been thrown out of heaven.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.