The Yin-Yang Theory is a fundamental concept in Chinese philosophy that describes how seemingly opposite forces are interconnected and interdependent in the natural world. Yin represents qualities such as darkness, passivity, and femininity, while Yang symbolizes light, activity, and masculinity. Together, they create a balance that is essential for harmony in life. This theory is often illustrated by the Yin-Yang symbol, which features a circle divided into black and white sections, each containing a dot of the opposite color. The interplay of Yin and Yang influences various aspects of life, including health, relationships, and the environment, emphasizing the importance of balance and harmony.