This book really defines how as humans we should focus on ourselves and by doing this we can be the best we want to be. Focusing on ourselves helps us to better understand and interact with others. So many life lessons and lightbulb moments that we never get taught in life, until this book. Highly recommend and can guarantee that everyone would get something from this book. I actually see the core habits and principles of this book being taught by a lot of other self help programs which probably originated from this book. Life changer.