Lucky pink Yin-Yang airplane keychain

Yin and yang

Yin-yang is a concept that originated in Chinese philosophy, describing an opposite but interconnected, self-perpetuating cycle. Yin and yang can be thought of as complementary and at the same time opposing forces that interact to form a dynamic system in which the whole is greater than the assembled parts and the parts are important for cohesion of the whole.

In Chinese cosmology, the universe creates itself out of a primary chaos of material energy, organized into the cycles of yin and yang form and matter. 'Yin' is retractive, passive and contractive while 'yang' is repelling, active and expansive.