Enemy-occupied territory---that is what this world is. Christianity is the story of how the rightful king has landed, you might say landed in disguise, and is calling us to take part in a great campaign of sabotage.
C.S. Lewis, in his book "Mere Christianity," portrays the world as a place under enemy occupation. He suggests that humanity is living in a realm tainted by evil, which influences people's lives and choices. This situation reflects a struggle against forces that oppose the true nature of goodness and truth.
Lewis further explains that Christianity presents a message of hope, emphasizing that the rightful king, symbolizing Christ, has come to Earth, albeit in a humble and unnoticed manner. His arrival represents a clarion call for believers to join in a transformative effort to undermine the power of evil, likening their religious commitment to a campaign of sabotage against darkness.