Charles Spurgeon Commentary Revelation 12:11-12

"And they overcame him because of the blood of the Lamb, and because of the word of their testimony; and they loved not their life even unto death. Therefore rejoice, O heavens, and ye that dwell in them. Woe for the earth and for the sea: because the devil is gone down unto you, having great wrath, knowing that he hath but a short time." — Revelation 12:11-12 (ASV)

Therefore rejoice ye heavens, and ye that dwell in them. Let great joy be in the hearts of all spiritual beings, whether angels or men, for Satan is cast down from among them.

But the battle is not over; the scene of it is only transferred from the heavenly realms to the earthly. Woe to the inhabiters of the earth and of the sea! for the devil is come down unto you having great wrath because he knoweth that he hath but a short time.

We may expect him to rage more and more as the time of his destruction comes nearer and nearer. He is like a bad tenant; he will damage the house out of which he is to be ejected. But he is to be ejected, and let God be glorified for it.