The Millennium is the term used to refer to the final dispensation in human history, when mankind’s stewardship will be to live in harmony with the risen, glorified Savior. Despite Jesus’ physical presence on Earth, however, sinful people will still rebel against Him (Rev. 20:7–8). Fire from heaven will consume the rebels; and Satan will be cast into the Lake of Fire, concluding this final epoch in human history (v. 9–10). When the Millennium ends and eternity begins, mortality will cease. Thus there will be no further need for God-given managerial structures (i.e., dispensations) for mortal human stewards.
As with all dispensations, the purpose of the Millennium will be to glorify God. His heavenly Kingdom will finally be established on the earth, once and for all (Zech. 14:9). His rule will be literal, material, and spiritual (spiritual does not equate with immaterial), administered by Jesus Christ who will reign from the throne of David in Jerusalem (Isa. 9:7; Ezek. 43:7).
Jesus does not presently sit on the throne of David in heaven, as some claim. Scripture says He sits at the right hand of the Father on His Father’s throne until His Father makes Jesus’ enemies a footstool for His feet (Ps. 110:1; Rev. 3:21). As pictured by the stone cut without hands in the book of Daniel, Jesus’ Millennial Kingdom will not be manmade; it will come from God and will fill the entire earth (Dan. 2:35, 44). It will serve as the radiant portion of the Day of the Lord and will be characterized by peace, prosperity, and righteous judgment (Isa. 2:1–4; 11:1–10; Joel 3:18, 20; Amos 9:13).
Following the Millennium, there is a transition prior to the new heaven and new earth, during which the wicked are judged at the Great White Throne (Rev. 20:7—21:1).
God will also be glorified in the Millennium because all of the unilateral, eternal covenants He made with Israel will be brought to fruition (Abrahamic—Gen. 12:1–3; Land—Ps. 105:8–11; Davidic—Ps. 89:3–4; New—Jer. 31:31–34). When Israel is restored to its place of blessing during this time, even the Gentiles will benefit (Zech. 8:23; Rom. 11:12).
Finally, God will be glorified in the Millennium because it will be shown that despite an ideal environment, mankind will still rebel against God’s rule, thus demonstrating God’s righteousness in all His judgments (Isa. 11:4; Rev. 20:8–9).