Duality refers to the concept of two opposing forces or elements that coexist and complement each other. It can be seen in various aspects of life, such as light and darkness, good and evil, or even joy and sorrow. This idea suggests that one cannot exist without the other, creating a balance that is essential for understanding the world around us. In philosophy and spirituality, duality often explores the relationship between the physical and spiritual realms. For instance, in Eastern philosophy, the yin-yang symbol represents the harmony between contrasting forces. Recognizing duality helps us appreciate the complexity of existence and encourages a deeper understanding of our experiences.