C. Lewis - The Complete C. S. Lewis Signature Classics

Put it more simply still. To be bad, he must exist and have intelligence and will. But existence, intelligence and will are in themselves good. Therefore he must be getting them from the Good Power: even to be bad he must borrow or steal from his opponent. And do you now begin to see why Christianity has always said that the devil is a fallen angel? That is not a mere story for the children. It is a real recognition of the fact that evil is a parasite, not an original thing. The powers which enable evil to carry on are powers given it by goodness. All the things which enable a bad man to be effectively bad are in themselves good things—resolution, cleverness, good looks, existence itself. That is why Dualism, in a strict sense, will not work.

But I freely admit that real Christianity (as distinct from Christianity-and-water) goes much nearer to Dualism than people think. One of the things that surprised me when I first read the New Testament seriously was that it talked so much about a Dark Power in the universe—a mighty evil spirit who was held to be the Power behind death and disease, and sin. The difference is that Christianity thinks this Dark Power was created by God, and was good when he was created, and went wrong. Christianity agrees with Dualism that this universe is at war. But it does not think this is a war between independent powers. It thinks it is a civil war, a rebellion, and that we are living in a part of the universe occupied by the rebel.

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 re-introduce 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?

But anyone who has been in authority knows how a thing can be in accordance with your will in one way and not in another. It may be quite sensible for a mother to say to the children, ‘I’m not going to go and make you tidy the schoolroom every night. You’ve got to learn to keep it tidy on your own.’ Then she goes up one night and finds the Teddy bear and the ink and the French Grammar all lying in the grate. That is against her will. She would prefer the children to be tidy. But on the other hand, it is her will which has left the children free to be untidy. The same thing arises in any regiment, or trade union, or school. You make a thing voluntary and then half the people do not do it. That is not what you willed, but your will has made it possible.

It is probably the same in the universe. God created things which had free will. That means creatures which can go either wrong or right. Some people think they can imagine a creature which was free but had no possibility of going wrong; I cannot. If a thing is free to be good it is also free to be bad. And free will is what has made evil possible. Why, then, did God give them free will? 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.

Of course God knew what would happen if they used their freedom the wrong way: apparently He thought it worth the risk. Perhaps we feel inclined to disagree with Him. But there is a difficulty about disagreeing with God. He is the source from which all your reasoning power comes: you could not be right and He wrong any more than a stream can rise higher than its own source. When you are arguing against Him you are arguing against the very power that makes you able to argue at all: it is like cutting off the branch you are sitting on. If God thinks this state of war in the universe a price worth paying for free will—that is, for making a live world in which creatures can do real good or harm and something of real importance can happen, instead of a toy world which only moves when He pulls the strings—then we may take it it is worth paying.

When we have understood about free will, we shall see how silly it is to ask, as somebody once asked me: ‘Why did God make a creature of such rotten stuff that it went wrong?’ The better stuff a creature is made of—the cleverer and stronger and freer it is—then the better it will be if it goes right, but also the worse it will be if it goes wrong. A cow cannot be very good or very bad; a dog can be both better and worse; a child better and worse still; an ordinary man, still more so; a man of genius, still more so; a superhuman spirit best—or worst—of all.

How did the Dark Power go wrong? Here, no doubt, we ask a question to which human beings cannot give an answer with any certainty. A reasonable (and traditional) guess, based on our own experiences of going wrong, can, however, be offered. The moment you have a self at all, there is a possibility of putting yourself first—wanting to be the centre—wanting to be God, in fact. That was the sin of Satan: and that was the sin he taught the human race. Some people think the fall of man had something to do with sex, but that is a mistake. (The story in the Book of Genesis rather suggests that some corruption in our sexual nature followed the fall and was its result, not its cause.) What Satan put into the heads of our remote ancestors was the idea that they could ‘be like gods’—could set up on their own as if they had created themselves—be their own masters—invent some sort of happiness for themselves outside God, apart from God. And out of that hopeless attempt has come nearly all that we call human history—money, poverty, ambition, war, prostitution, classes, empires, slavery—the long terrible story of man trying to find something other than God which will make him happy.

The reason why it can never succeed is this. God made us: invented us as a man invents an engine. A car is made to run on petrol, and it would not run properly on anything else. Now God designed the human machine to run on Himself. He Himself is the fuel our spirits were designed to burn, or the food our spirits were designed to feed on. There is no other. That is why it is just no good asking God to make us happy in our own way without bothering about religion. God cannot give us a happiness and peace apart from Himself, because it is not there. There is no such thing.

That is the key to history. Terrific energy is expended—civilisations are built up—excellent institutions devised; but each time something goes wrong. Some fatal flaw always brings the selfish and cruel people to the top and it all slides back into misery and ruin. In fact, the machine conks. It seems to start up all right and runs a few yards, and then it breaks down. They are trying to run it on the wrong juice. That is what Satan has done to us humans.