Taiji philosophy, also known as the philosophy of the Supreme Ultimate, is a fundamental concept in Taoist-Confucian cosmology. It is a philosophical framework that seeks to understand the natural world and the universe through the interplay of two complementary forces, yin and yang.

According to Taiji philosophy, yin and yang are not opposing or conflicting forces, but rather they are two complementary aspects of the same whole. They are interdependent and interconnected, constantly influencing and balancing each other. This relationship is often depicted in the familiar yin-yang symbol, where the black and white halves represent the opposing forces that are in constant motion and harmony with each other.

Yin and yang are not static concepts, but rather they are dynamic and ever-changing. They are not considered as good or bad, but rather as necessary and essential for the balance and harmony of the universe. Just as day and night, hot and cold, and life and death are all necessary for the natural order of things, yin and yang are also necessary for the balance and harmony of the universe.

In Taiji philosophy, yin and yang are also seen as complementary energies that exist within all beings and things. This means that yin and yang are not only present in the external world, but also within ourselves. They are seen as the two sides of our inner nature, with yin representing the feminine, passive, and introspective aspects, and yang representing the masculine, active, and outwardly focused aspects.

The goal of Taiji philosophy is to achieve harmony and balance between yin and yang, both within ourselves and in our relationship with the external world. This involves recognizing and embracing the complementary nature of these forces, rather than seeing them as opposing or conflicting. By achieving this balance, one can achieve a state of inner peace and harmony, and live in accordance with the natural order of the universe.

In conclusion, Taiji philosophy views the relationship between yin and yang as one of harmony, balance, and interdependence. By understanding and embracing this relationship, one can achieve a deeper understanding of the natural world and live in harmony with it.