I am continuing to re-make my way slowly through Mere Christianity
by C.S. Lewis. It is great reading. If you have never read it, Christian or not, I highly recommend it. The section I have quoted below comes from book 2, chapter one, “The Rival Conceptions of God. n it he briefly shows how atheism is irrational because it is self-refuting. Note: Mere Christianity is divided into four books but please don’t let that discourage you from reading it. Each chapter is very short because they were all initially brief radio addresses made during W.W. Two.
For Christianity is a fighting religion. It thinks God made the world—that space and time, heat and cold, and all the colours and tastes, and all the animals and vegetables, are things that God ‘made up out of His head’ as a man makes up a story. But it also thinks that a great many things have gone wrong with the world that God made and that God insists, and insists very loudly, on our putting them right again. And, of course, that raises a very big question. If a good God made the world why has it gone wrong? And for many years I simply refused to listen to the Christian answers to this question, because I kept on feeling ‘whatever you say, and however clever your arguments are, isn’t it much simpler and easier to say that the world was not made by any intelligent power? Aren’t all your arguments simply a complicated attempt to avoid the obvious?’ But then that threw me back into another difficulty. My argument against God was that the universe seemed so cruel and unjust. But how had I got this idea of just and unjust? A man does not call a line crooked unless he has some idea of a straight line. What was I comparing this universe with when I called it unjust? If the whole show was bad and senseless from A to Z, so to speak, why did I, who was supposed to be part of the show, find myself in such violent reaction against it? A man feels wet when he falls into water, because man is not a water animal: a fish would not feel wet. Of course I could have given up my idea of justice by saying it was nothing but a private idea of my own. But if I did that, then my argument against God collapsed too—for the argument depended on saying that the world was really unjust, not simply that it did not happen to please my fancies. Thus in the very act of trying to prove that God did not exist—in other words, that the whole of reality was senseless—I found I was forced to assume that one part of reality—namely my idea of justice—was full of sense. Consequently atheism turns out to be too simple. If the whole universe has no meaning, we should never have found out that it has no meaning: just as, if there were no light in the universe and therefore no creatures with eyes, we should never know it was dark. Dark would be a word without meaning.
Lewis, C. S.. Mere Christianity (C.S. Lewis Signature Classics) (pp. 37-39). HarperCollins. Kindle Edition.