the earth will be filled with the glory of God

When Christ came to earth over two thousand years ago, he came to inaugurate his kingdom successfully. During his ministry here, he bound Satan. Within a generation of his crucifixion he destroyed the old world of the old covenant and ushered in a new heavens and a new earth. The church is now the Holy City of God and all of the nations are brought into it. She will continue to preach the gospel on earth for thousands upon thousands of years, progressively growing in number and strength until one day, far in the future, the entire world will be transformed by the power of Christ and an Eden-like paradise will be restored. At some point in that golden day, Christ will return to judge the living and the dead. Those who rejected his gospel will be sent to eternal punishment. The dead in Christ will be raised, joined to their resurrected bodies, and all the saints of all the ages will live together in union and communion with the Triune God for eternity. (p39-40, Duane Garner 'Why the End is Not Near')