The concept of Yin and Yang is so basic to Tai Chi that instructors often forget to explain it. I think that part of the reason lies in how common it is to see the Yin Yang symbol these days. You just assume that everyone understands. In ancient Chinese thought the whole of existence is manifested through a repeating pattern of dynamic opposites. Two opposing polar forces that belong both together and separately. Wu Chi, the state before the division into these polar forces o