As a practitioner of qi gong under the tutelage of master Wei Fo Jung, I found his book useful in introducing me to the range of arts important to the practice of the yin xin tang school of martial arts. Some of these elements may be surprising, like the art of eating or the art of sleeping, where traditional masters offered thorough instructions for how to intentionally do something for maximum health and benefit, which we all mostly just do mindlessly. Some elements of this book will mean more after a student has some concrete experience to connect for the texts. For example, the lineage chapter clearly states that one of the roots of yin xin tang is the practice of tantra. This meant very little to me until Master Jung introduced tantric elements into my actual practice. Many of the explorations here are introductory glances into profound arts, such as meditation or the study of the mind. In one charming journal entry, for example, Master Jung describes a conversation he had with his master as a child about the nature of the self. The journal entry doesn’t arrive at any clear answer or distinguish in much depth the journey to attempt to arrive at an answer. That’s fine for an introductory text, intended to inspire and accompany study with a master, not replace it. In that sense, readers should not expect this book to teach them yin xin tang, but rather introduce them to the core areas of practice in yin xin tang and some of their history. That’s all. 4 out 5