Charles Spurgeon Commentary Revelation 12:10

"And I heard a great voice in heaven, saying, Now is come the salvation, and the power, and the kingdom of our God, and the authority of his Christ: for the accuser of our brethren is cast down, who accuseth them before our God day and night." — Revelation 12:10 (ASV)

Always at it! This prince of evil, pretending to goodness, and daring to bring accusations against the Holy One of God. But he is not permitted now to stand in the court; he is hurled from his high place. He used his place with a desperate, stubborn persistence of malice, accusing the brethren day and night.