Yin and yang

In Chinese philosophy, the concept of yin-yang, which is often called “yin and yang”, is used to describe how seemingly opposite or contrary forces are interconnected and interdependent in the natural world; and, how they give rise to each other as they interrelate to one another. Many natural dualities (such as female and male, dark and light, low and high, cold and hot, water and fire, life and death, and so on) are thought of as physical manifestations of the yin-yang concept.