7 When the thousand years come to an end, Satan will be let out of his prison. 8 He will go out to deceive the nations-called Gog and Magog-in every corner of the earth. He will gather them together for battle-a mighty army, as numberless as sand along the seashore. 9 And I saw them as they went up on the broad plain of the earth and surrounded God's people and the beloved city. But fire from heaven came down on the attacking armies and consumed them.

Matthew Henry's Commentary on Revelation 20:7-9

Commentary on Revelation 20:7-10

(Read Revelation 20:7-10)

While this world lasts, Satan's power in it will not be wholly destroyed, though it may be limited and lessened. No sooner is Satan let loose, than he again begins deceiving the nations, and stirring them up to make war with the saints and servants of God. It would be well if the servants and ministers of Christ were as active and persevering in doing good, as his enemies in doing mischief. God will fight this last and decisive battle for his people, that the victory may be complete, and the glory be to himself.