" Jesus wasn’t content to leave existing structures in place and start up a nice, quiet, unobtrusive movement somewhere else. He didn’t want the rest of the world to go on with its idea of kingship while he started a sect, a separatist movement that wouldn’t challenge that notion. That might have been the effect of allowing human rulers to keep the word king while choosing a different slogan altogether. What he was doing was far more radical. Not only was Jesus plugging in to the ancient scriptural promises that spoke of God coming back at last to be king of his people and the whole world. He was insisting that this kingdom of God, this new reality, the heart of his good news, was a different sort of rule based on a different sort of power. And that it was designed to challenge the present powers of the world with a new kingship that would trump theirs altogether. "
― N.T. Wright , Simply Good News: Why the Gospel Is News and What Makes It Good