The idea at the center of this book is neuroplasticity, the idea that the brain can change and evolve into new patterns of thinking (literally reprogram which neurons fire together) to enable growth and change. I was fascinated by the sections on the brain; his model of the brain in the hand is simple and so easy to understand. The case studies were also exciting as I watched people find that they could develop new ways of thinking. He draws heavily on mindfulness and describes good mental health as a mind not too chaotic and also not too rigid. I did find by the end he was repeating himself and much of the description of the ideas was too simplistic. He has written a more scholarly version I want to check out next.