The Kingdom of God is primarily an eschatological concept. The fundamental idea of the Kingdom in Scripture is not that of a restored theocratic kingdom of God in Christ - which is essentially a kingdom of Israel-, as the Premillenarians claim; neither is it a new social condition - the primary idea of the Kingdom of God in Scripture is that of the rule of God established and acknowledged in the hearts of sinners by the powerful regenerating influence of the Holy Spirit - a rule that is realized in principle on earth, but will not reach its culmination until the visible and glorious return of Jesus Christ.Systematic Theology, 568