Elijah2come

     Then Satan the devil is imprisoned for a thousand years to keep him from deceiving the nations any more until the thousand years are ended (Revelation 20:2-3). The kingdoms of the world will become the kingdom of Christ (Revelation 11:15). Jesus rules over the earth as King of kings and Lord of lords (Revelation 19:16).
     Then, after the thousand years since the devil was imprisoned, the devil will be set free for a short time so He can go out to deceive all the nations of the earth again to gather them for battle. The nations' armies will again surround God's people. Then fire comes down from heaven and burns up the entire earth. The earth and heaven are destroyed, and the devil will be thrown into the "lake of burning sulfur" (Revelation 20:7-10). The "lake of fire" is the destruction of the entire universe because both heaven and earth are burned up. Notice in the following versus that both heaven and earth (the entire universe) are destroyed and then replaced with a new heaven and new earth:

Then I saw "a new heaven and a new earth," for the first heaven and the first earth had passed away, and there was no longer any sea. I saw the Holy City, the new Jerusalem, coming down out of heaven from God, prepared as a bride beautifully dressed for her husband. And I heard a loud voice from the throne saying, "Look! God's dwelling place is now among the people, and he will dwell with them. They will be his people, and God himself will be with them and be their God. 'He will wipe every tear from their eyes. There will be no more death' or mourning or crying or pain, for the old order of things has passed away." He who was seated on the throne said, "I am making everything new!" Then he said, "Write this down, for these words are trustworthy and true."
(Revelation 21:1-5)

God will place us (believers who follow Christ) into this new earth, and God will dwell and live with us. God will wipe every tear from his peoples' eyes, and there will be no more death or mourning or crying or pain. We will, at last, be happy forever!