Yin/Yang expresses a system of relationships, patterns and functions. Everything in the Chinese view of the world and of life is related to a dynamic balance of ying/yang. Everything has an inside (yin) and an outside (yang), a top (yin) and a bottom (yang). There is a continual communication between these two hemispheres of energy. Life takes places in the alternating rhythm of ying/yang- day gives way to night, night to day; a time of light and activity (yang) is followed by darkness and rest (ying). Flowers open and close, the tides come in and out, we wake and sleep and we breathe in and out. The ying/yang is a constant and continual flow of this energy, when it is disrupted, pain and disease can manifest.