7 When the thousand years are over, Satan will be released from his prison 8 and will go out to deceive the nations in the four corners of the earth-Gog and Magog-and to gather them for battle. In number they are like the sand on the seashore. 9 They marched across the breadth of the earth and surrounded the camp of God's people, the city he loves. But fire came down from heaven and devoured 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.