If, like me, you spend a lot of time online—especially on social media—or watching the news you probably have a constant, low-level sense of anxiety. Always focusing on the problems in the world can cause us to feel a perpetual sense of unease. But while we may try to blame this feeling on the state of the world, deep down we know there must be something more to it. We have a sense that something is truly wrong, as if objective standards are being violated.

In a BBC broadcast from August 1941 (which would later e a chapter in the book Mere Christianity), C.S. Lewis explains why we have reason to be disturbed: because there exists a Moral Law, because there is a Mind behind this Law who expects us to act in a particular manner, and because we have all fallen short of meeting this expectation.