Excellent book all the way through. I have been practicing martial arts ranging from shaoling kung fu to taichi. I have always been interested in chi for instance. It is the force that we have inside of us and we can cultivate and and use it for either inner strength, outer strength or used for healing. For the first time in my life I experienced the chi inside of me through the constant practice of kundalini yoga described in this book. As with anything else in the world you will only get out of it what you put into it. Back pain has gone away never to return and I am a changed man as far as my ego and can feel the difference in my life.