Book excerpt: Humans learn by association. Every concept that you understand is connected to an earlier concept. So then, what happens if you retrace those connections? Wouldn't you eventually find a starting point? Indeed, you would. The Tangled Mind argues that a small group of sensory concepts sculpted your perception of the world. Today, your entire knowledge rests upon a sensory foundation. In this book, you'll learn how those sensory underpinnings sculpt your perception and behavior, including deep-rooted beliefs and values (e.g., morality, religion, politics).