The phrase “kingdom of God” is not a strict synonym for heaven; its meaning depends on context. Many New Testament references—especially those involving inheritance—point not to heaven as God’s dwelling, but to the future, earthly Millennial Kingdom of Christ. It’s called the kingdom of God because it’s God’s rule—on earth. The authority is heavenly, but the reign is earthly. Jesus will bring divine government down to Jerusalem, fulfilling the prayer: “Your kingdom come, Your will be done, on earth as it is in heaven” (Matt 6:10). That kingdom will be a literal, thousand-year reign of Jesus Christ from Jerusalem (Rev 20:1-6), where He will rule the nations with righteousness and justice (Isa 2:2-4; Zech 14:9, 16-17; Luke 1:32-33). This is not symbolic—it’s global, political, economic, and centered in real geography.