The main focus of this Tai Chi Chuan book is on the explanation of the principles in relation to the human anatomy and physiology through the eyes of a medical doctor with some 36 years experience. Tai Chi Chuan is basically an internal form besides the external movements which are in synchrony and harmony during the exercise. This book will be helpful and beneficial to Tai Chi students who already know the external forms. If they practice without fully understanding the principles, they are just groping in the dark which is very frustrating. The author helps to switch on the light enabling them to see clearly. This is the main purpose of this book on top of good health.