The kingdom is a new life
We are introducing the kingdom of God and so far have seen it is not: a political movement; a means of domination over people; or a geographical territory. King-dom refers to the dominion of the King. It is a reference to the activity of the King, Jesus, and the works of the King operating through His children. Jesus said it is something you receive within you when you demonstrate the humility and faith of a child. What could that be?
Remember that both John the Baptist and Jesus Christ told the crowds that they must repent for the kingdom of God was coming. With that foundational truth, we see that repentance, a personal, humble, and sincere, turning away from our sinful lifestyle, is where our journey into the kingdom of God, our new life, begins.
In Mark 9:43-47, Jesus spoke of entering the kingdom as entering into life.
In Matthew 25: 34-36, Jesus said those who inherit the kingdom also inherit life.
And in Mark 10:17-23, the gate to the kingdom is the way that leads to life.
The kingdom, then, is a new life that begins with repentance, asking forgiveness for our sinful old life. Personal repentance therefore is the door to the Kingdom. So if repentance is just the door, how can we enter in and receive that kingdom life within us promised by the King?