'Kingdom of God is not merely a synonym for God's sovereignty; rather, it is a specific historical program. God is always sovereign, always King in a general way. But since the fall, he must, as King, put down opposition and bring human beings to acknowledge his kingship. The kingdom of God in the New Testament is that historical program, the series of events, by which God drives his kingship home to sinful human beings.'
John Frame, Salvation Belongs to the Lord, p.248.