Yin Yang

YIN YANG -  The yin-yang symbol holds its roots in Taoism/Daoism, a Chinese religion and philosophy.  The yin, the dark swirl, is associated with shadows, femininity, and the trough of a wave.  The yang, the light swirl, represents brightness, passion and growth.  

In Chinese philosophy, yin "Dark" and yang "Light" describe how seemingly opposite forces may actually be complementary and interconnected.  Many tangible dualities (such as light and dark, fire and water, expanding and contracting) are thought of as physical manifestations of the duality symbolized by yin and yang. 

Yin and yang can be thought of as complementary (rather than opposing) forces that interact to form a dynamic system in which the whole is greater than the assembled parts.  Everything has both yin and yang aspects, (for instance shadow cannot exist without light).  Either of the two major aspects may manifest more strongly in a particular object, depending on the criterion of the observation.  The yin yang (i.e. taijitu symbol) shows a balance between two opposites with a portion of the opposite element in each section.