All Things have Yin and Yang Aspects
All things have yin and yang aspects. They are complementary, not opposing forces. The so-called dualities such as female and male, dark and light, low and high, cold and hot, water and fire, weak and strong..., all but the manifestations of the yin-yang. In Chinese ancient science "I Ching", the supreme source of yin-yang is "Tai Chi". When we favor one over the other, the natural balance is lost in between the two elements, the disaster happens.