A "kingdom," as I wrote earlier, is a king's domain. To belong to the Kingdom of God means we surrender our life to God and make it part of the domain over which he rules. When we do this, we immediately begin so experience the Life that comes from God and begin to be transformed into the image of Jesus.
Gregory A. Boyd, The Myth of a Christian Religion (Grand Rapids: Zondervan, 2009), 42.
Soli Deo Gloria