Descartes considered the mind to be fully self-transparent; that is, he thought that we need only introspect to know what goes on inside our own minds. More recently, social psychology has shown that a great deal of high-level cognition takes place at an unconscious level, inaccessible to introspection. How then do we gain insight into ourselves? How reliable are the narratives that we construct about ourselves and our internal lives? Are there other reliable routes to self-knowledge, or are we condemned to being forever deluded about who we truly are? John and Ken look inward with Timothy Wilson from the University of Virginia, author of Strangers to Ourselves: Discovering the Adaptive Unconscious.