The Tai Chi symbol represents the duality of natural things, where everything that exists is undergoing change, while the balance of Yin & Yang is still maintained. This interaction of Yin & Yang relate to all known things, both living and non-living.

A graphical representation of Tai Chi is seen in the symbol on this page, often referred to by Westerners as the Yin/Yang symbol.

Of the two fish like shapes depicted in the symbol, Yin is black and Yang white. Within each of the fish shapes, the small dot or ‘eye’ illustrates that a small component of its opposite always exists within itself. Hence something can never be completely Yin or Yang.

Some more obvious examples of Yin & Yang would be: female & male; winter & summer; night & day; good & bad and hard & soft.