The I Ching Principle is an ancient Chinese philosophical system that is based on the idea of Yin and Yang. The term 'Yin' refers to the feminine, dark, and passive aspects of life, while 'Yang' refers to the masculine, light, and active aspects. The I Ching Principle states that these two forces are in constant interaction and must be balanced in order to achieve harmony. The term 'Yang' is used to refer to the masculine, light, and active aspects of life.