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 all to take part in a great campaign of sabotage. When you go to church you are really listening-in to the secret wireless from our friends: that is why the enemy is so anxious to prevent us from going. He does it by playing on our conceit and laziness and intellectual snobbery. I know someone will ask me, "Do you really mean, at this time of day, to reintroduce our old friend the devil-hoofs and horns and all?" Well, what the time of day has to do with it I do not know. And I am not particular about the hoofs and horns. But in other respects my answer is "Yes, I do." I do not claim to know anything about his personal appearance. If anybody really wants to know him better I would say to that person, "Don't worry. If you really want to, you will Whether you'll like it when you do is another question."Christians, then, believe that an evil power has made himself for the present the Prince of this World. And, of course, that raises problems. Is this state of affairs in accordance with God's will or not? If it is, He is a strange God, you will say: and if it is not, how can anything happen contrary to the will of a being with absolute power?Because free will though it makes evil possible, is also the only thing that makes possible any love or goodness or joy worth having. A world of automata-of creatures that worked like machines-would hardly be worth creating. The happiness which God designs for His higher creatures is the happiness of being freely, voluntarily united to Him and to each other in an ecstasy of love and delight compared with which the most rapturous love between a man and a woman on this earth is mere milk and water. And for that they must be free.
From C. S. Lewis Mere Christianity
February 7, 2011