The Kingdom of God is seen in Scripture in several different aspects. When Christ came to the earth the first time, He offered a literal kingdom to the nation of Israel. The Jews wanted deliverance from the Roman oppressors, but they did not want to repent of their sins. Christ could only reign over a people who were in proper spiritual relationship to Him. When that was made clear to them, they rejected their King and crucified Him. Since then, the Lord Jesus has gone back to heaven and we now have the Kingdom in mystery form (Matt.13) – it’s a spiritual kingdom where Christ Jesus (God) living in us when we as believers except the Lord Jesus Christ as our Lord and Saviour. This means that the kingdom does not appear in visible form. The King is absent. But all who accept the Lord Jesus Christ during this present age and acknowledge Him as their rightful ruler, and thus are subjects of His kingdom. In a coming day, the Lord Jesus will come back to earth, set up His kingdom with Jerusalem as capital, and reign for a 1000 years. At the end of that time, Christ will put down all enemies under His feet and then deliver up the kingdom to God, the Father. That will inaugurate the eternal kingdom, which will continue throughout eternity.