Believers, that is born-again Christian who have called from darkness into His marvellous Light belong to the Kingdom of God and not the kingdoms of this world. In other words, we are citizens of the former, not the latter. There is no dual citizenship; you either belong to one domain, or the other.
The kingdom of God is not a geographic space. It is not an abstract space either. Rather, it is experiential field. “And when He was demanded of the Pharisees, when the kingdom of God should come, He answered them and said, The kingdom of God cometh not with observation: neither shall they say, Lo here! or, lo there! for, behold, the kingdom of God is within you.” (Luke 17:20-21 KJV)
It is also written in the Scriptures; “…for the kingdom of God is not meat and drink; but righteousness, and peace, and joy in the Holy Ghost.” (Romans 14:17 KJV)
Finally, the kingdom of God is everlasting: “Thy kingdom is an everlasting kingdom, And thy dominion endureth throughout all generations.” (Psalm 145:13 KJV)
Consider Paul the Apostle, who “dwelt two whole years in his own hired house, and received all that came in unto him, preaching the kingdom of God, and teaching those things which concern the Lord Jesus Christ, with all confidence, no man forbidding him.” (Acts 28:30-31 KJV) For as the Lord Himself declared, “…Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.” (John 3:3b KJV)
Hallelujah! Praise the Lord for the Kingdom of God has come. And our King is Jesus – “The Alpha and Omega, the Beginning and the End, the First and the Last.” (Revelation 22:13 KJV)