Revelation 12:10

And I heard a loud voice saying in heaven
Which was a song of praise on account of the victory obtained by Michael and his angels over the dragon and his, or for the overthrow and downfall of Paganism in the Roman empire; for by "heaven" is meant the empire, now become Christian, or the Christian church state in it; and the "loud voice" heard in it by John shows that there was a great number in it, who rejoiced on this occasion, and that they were full of affection and fervency, and therefore expressed themselves in such manner, and in form following:

now is come salvation and strength, and the kingdom of our God, and
the power of his Christ;
"salvation" was come when Christ obtained it by his sufferings and death, and comes to particular persons in the effectual calling, and it will only be fully come when it is perfectly enjoyed in heaven: but here it designs a deliverance from Satan, as the god of this world, who was now dethroned, and cast down from his power, authority, and influence in the empire; and from Pagan idolatry and superstition, and from the ten days of tribulation, the cruel and bloody persecutions under the Heathen emperors; and denotes that safety and security, comfort, peace, and happiness, the churches enjoyed under the government of a Christian emperor: and now was come "strength"; not the strength of Christ personal, displayed in the redemption of his people; but rather of Christ mystical, of his church and interest, which had been very weak and low, and under oppression and persecution, but was now exalted, and in a flourishing condition, and was become strong and mighty; or it may design the strength and power of Christ, shown in destroying his enemies, in casting the dragon out of heaven down to the earth, and in bringing to confusion and destruction the Heathen emperors, princes, and others, who fled to the rocks and mountains for fear of him, and because of his great wrath: also now came "the kingdom of our God", the Gospel of the kingdom was preached everywhere and Gospel churches were set up in all parts of the empire, both which are sometimes signified by the kingdom of God; here was now an illustrious appearance of the kingdom of God in the world, such as had never been before; and which was a pledge and presage of the greatness of the kingdom, or of that everlasting kingdom which will be set up hereafter, when all other kingdoms will be at an end: to which is added "the power of his Christ"; or his authority as Lord and Christ, which took place at his resurrection, ascension, and session at the right hand of God, and which will more fully appear at the last day, when he shall come in glory, and exercise his authority in judging the quick and dead, of which there was some resemblance at this time, in dethroning Satan, destroying Paganism, and putting an end to the power of the Heathen emperors and empire; and which is expressed in such language as the day of judgment is, ( Revelation 6:12-17 ) ; for to the opening of the sixth seal does this passage belong: a further account is given of the matter of this song, and the reason of it:

for the accuser of our brethren is cast down;
hence it appears that this is not a song of the angels in heaven, since the saints are never called their brethren, nor the angels theirs, but their fellow servants; rather it may be thought to be the song of the saints in heaven, acknowledging those on earth to be their brethren, as they are, for there is but one family in heaven and in earth, and the saints on earth are called the of the souls under the altar, ( Revelation 6:9 Revelation 6:11 ) ; but as this refers to the state of the church in Constantine's time, it must be the song of the saints in that state, who call the martyrs, that had been slain under the former persecutions, their brethren; for that they are the persons meant is clear from the following verse, whom Satan is an accuser of, for he is designed here; the word rendered "devil" signifies an accuser, and a false one, and is so translated ( Titus 2:3 ) ; this is a name frequently given to Satan by the Jews, and have adopted into their language the very Greek word ^F17 that is here used; and often say of him that he accuses Israel, and particularly that he accuses Israel above, that is, in heaven; and that he stands and (dymt grjqm) ^F18, "continually accuses them", the very phrase used in the next clause: when Israel came out of Egypt, they say ^F19 the angel Samael (the devil) stood and accused them; the first day of the month Tisri, according to them ^F20, is appointed a day for blowing of trumpets, to confound Satan, who comes to accuse at that time; so they say ^F21 that Satan stood and accused Abraham, and others; and indeed he was an accuser from the beginning, both of God to men, and of men to God; we have instances in Job and Joshua the high priest, ( Job 1:8-11 ) ( Zechariah 3:1 ) ; but here it refers to the accusations brought against the Christians in the primitive times, during the ten persecutions, which were very horrid ones indeed; as that they had their private suppers, at which they ate their own infants, and their nightly meetings, for the gratifying of their lusts, in which they committed adultery, incest, and all manner of uncleanness; if ever a fire happened in a city, they were charged with it; and whenever there were any famine, or pestilence, or wars, or any public calamity, they were accused as the cause and occasion of it; as appears from the apologies for them written by Justin, Tertullian, Cyprian, Minutius Felix so that Satan at this time was remarkably the accuser of the brethren; but now this father of lies was cast down, he was cast out of heaven, and deprived of that power and authority he had in the empire, and lost his influence over men, and could not spread his lies, and get his false charges and accusations credited and received as before; he was not indeed wholly destroyed, nor even shut up in the bottomless pit, but he was cast down to the earth; he was in a low condition, his power was greatly diminished, and he was conquered by Christ, and cast down and bruised under the feet of the saints,

which accused them before our God day and night;
so the evil spirit in Ahab's time, and Satan in Job's time, are said to stand before the Lord: and this shows the malice, and also the insolence of the devil, that he should stand and accuse the saints before God, who he knew was their God, and was on their side, and therefore his accusations could be of no avail; and though Christ appears in the presence of God for them, and is their advocate with the Father, yet he is constant and indefatigable in going about, and picking up charges against them, and carrying them to God.