Revelation 12:9

And the great dragon... — Better, And he was thrown down, the great dragon, the ancient serpent, he that is called the Devil and Satan: he who deceives the whole world was thrown to the earth, and his angels were thrown with him. Thus the victory of Christ is marked by the overthrow of the great adversary. The stronger than the strong one has come, and taken away his armour (Luke 11:21). The death-blow is given. The prince of this world (who found nothing in Christ) is judged (John 16:11). The adversary is described as the dragon, the fierce and cruel foe who is ever ready to devour (1 Peter 5:8). The ancient serpent. The serpent was used as an emblem of the evil principle. (Comp. Genesis 3:1). But the head of the ancient foe of man is now bruised: he is the devil, the accuser and calumniator. He is called the accuser of the brethren in the next verse; he is Satan, the adversary, and he is the seducer, the deceiver, as he is a liar, and the father of it (John 8:44).