7 When the thousand years are up, Satan will be let loose from his cell, 8 and will launch again his old work of deceiving the nations, searching out victims in every nook and cranny of earth, even Gog and Magog! He'll talk them into going to war and will gather a huge army, millions strong. 9 They'll stream across the earth, surround and lay siege to the camp of God's holy people, the Beloved City. They'll no sooner get there than fire will pour out of Heaven and burn them up. 10 The Devil who deceived them will be hurled into Lake Fire and Brimstone, joining the Beast and False Prophet, the three in torment around the clock for ages without end.

The Judgment at the Great White Throne

11 I saw a Great White Throne and the One Enthroned. Nothing could stand before or against the Presence, nothing in Heaven, nothing on earth. 12 And then I saw all the dead, great and small, standing there - before the Throne! And books were opened. Then another book was opened: the Book of Life. The dead were judged by what was written in the books, by the way they had lived. 13 Sea released its dead, Death and Hell turned in their dead. Each man and woman was judged by the way he or she had lived. 14 Then Death and Hell were hurled into Lake Fire. This is the second death - Lake Fire. 15 Anyone whose name was not found inscribed in the Book of Life was hurled into Lake Fire.

Matthew Henry's Commentary on Revelation 20:7-15

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.

Commentary on Revelation 20:11-15

(Read Revelation 20:11-15)

After the events just foretold, the end will speedily come; and there is no mention of any thing else, before the appearing of Christ to judge the world. This will be the great day: the Judge, the Lord Jesus Christ, will then put on majesty and terror. The persons to be judged are the dead, small and great; young and old, low and high, poor and rich. None are so mean, but they have some talents to account for; and none so great, as to avoid having to account for them. Not only those alive at the coming of Christ, but all the dead. There is a book of remembrance both for good and bad: and the book of the sinner's conscience, though formerly secret, will then be opened. Every man will recollect all his past actions, though he had long forgotten many of them. Another book shall be opened, the book of the Scriptures, the rule of life; it represents the Lord's knowledge of his people, and his declaring their repentance, faith, and good works; showing the blessings of the new covenant. By their works men shall be justified or condemned; he will try their principles by their practices. Those justified and acquitted by the gospel, shall be justified and acquitted by the Judge, and shall enter into eternal life, having nothing more to fear from death, or hell, or wicked men; for these are all destroyed together. This is the second death; it is the final separation of sinners from God. Let it be our great concern to see whether our Bibles justify or condemn us now; for Christ will judge the secrets of all men according to the gospel. Who shall dwell with devouring flames?