Once upon a time in a land called Judaea, there lived these guys called Pharisees. Now the Pharisees kept looking for the Kingdom of God, and they felt that if they could teach the people to be good enough, then God would establish his kingdom in Jerusalem. This idea made sense to many people at the time, but then this guy named Jesus showed up.
Jesus taught that the Pharisees were looking for the right thing but that they were looking for it in the wrong place. The Kingdom of God is not a political kingdom in space or time; it’s spiritual and eternal. Jesus’ own disciples had trouble understanding this idea. Even at the very end of Jesus’ time on earth they were saying, “Lord, will you at this time restore the kingdom to Israel?” Eventually the disciples would figure it out, and they spread the gospel that Jesus’ perfect sacrifice brings about the kingdom. The early church grew.