7 And when the thousand years are ended, Satan will be let loose out of his prison, 8 And will go out to put in error the nations which are in the four quarters of the earth, Gog and Magog, to get them together to the war, the number of whom is like the sands of the sea. 9 And they went up over the face of the earth, and made a circle about the tents of the saints, and the well loved town: and fire came down out of heaven for their destruction.
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.