Yin and yang

Chinese word.  In Chinese philosophy, yin and yang are opposite forces [it can not be simply said as positive or negative electrical force] that form a whole. Everything contains both yin and yang in a balance that is always changing, such as hot and cold, day and night, and health and disease. In traditional Chinese medicineMedicine Refers to the practices and procedures used for the prevention, treatment, or relief of symptoms of diseases or abnormal conditions. This term may also refer to a legal drug used for the same purpose., a disease is diagnosed and treated based on the balance of yin and yang.