The Kingdom Reign of Christ, often called the Millennium, is, of course, still future, but even this dispensation will commence with a clear indication that our Lord’s beneficent reign will not change the unregenerate heart. Man is still a failure.
This will be evident from the fact that to put the rebellion down our Lord will have to “break” the nations “with a rod of iron” and “dash them in pieces like a potter’s vessel” (Psa. 2:9). Indeed, He will have to “rule them with a rod of iron” (Rev. 2:27). It is not strange, then, that we read in Revelation 20:7-9:
“And when the thousand years are expired, Satan shall be loosed out of his prison, and shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom is as the sand of the sea. And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them.”
This final rebellion is followed by the casting of Satan and all unbelievers into the lake of fire and the bringing in of the new heavens and the new earth in which all the reconciled find their all in Christ (Rev. 20:10-21:1; Eph. 1:9,10; Col. 1:19,20). It is interesting and instructive to see in the book of Revelation how the slain Lamb occupies the center of the glory of the universe. Not one saint from any age will ever boast of his own righteousness in that day. All will acknowledge their own unworthiness and proclaim the praises of the One who died that they might live and be justified. And even the unsaved and all demons and angels will acknowledge Jesus as Lord in that day. Because He humbled Himself and submitted Himself to “even the death of the cross… God also hath highly exalted Him, and given Him a name which is above every name:
“THAT AT THE NAME OF JESUS EVERY KNEE SHOULD BOW, OF THINGS IN HEAVEN, AND THINGS IN EARTH, AND THINGS UNDER THE EARTH; AND THAT EVERY TONGUE SHOULD CONFESS THAT JESUS CHRIST IS LORD, TO THE GLORY OF GOD THE FATHER” (Phil.2:8-11). source