Yin and Yang are the two energies that embody Universal law, which ensures that all things remain in harmony. Yin creates the form and grows it while the yang generates energy and expands it. This is the bringing together of two halves to make a complete whole.
The outer circle of the yin yang sign represents everything in the universe as well as the universe itself. Yin is the black area and represents the female. Yang is the white area and represents the male. Located in the areas of their opposite colors, the small circles show that nothing is absolute.