Learn about the Tai Ji (Tai Chi) symbol and the Theory of Yin and Yang. See how this ancient theory is a scientific theory compatible with modern scientific understanding. Learn how this theory was understood in the classic literature of the Chinese and its subcultures. Learn that there is a connection with Yoni and Linga of ancient Indian thought. Learn how this theory is essential to a deeper understanding of martial arts and energy arts. The information in this text will help students and teachers of Karate, Kung Fu, Jujutsu, Wushu, Yoga, Qi Gong (Chi Kung), Reiki, and many more.