The symbol of Yin Yang is also known as Tai Chi, The Ultimate Supreme or the Great Art. This symbol represents the two fundamental principles of Chinese philosophy. Complementary, they represent the two extremes of a whole and coexist together.
The outer circle represents the "everything", ie the universe and all that it contains. It contains the duality of all that exists, harmony and equilibrium within the universe.
The black and white shapes in the circle represent the interaction of two opposing energies, called "Yin" (black) and "Yang" (white). Combined, these forces are at the root of everything that happens in our world. The "S" shape of the black and white sections symbolises the continual movement of these two energies.
If you connect to this symbol you will be able to find harmony and equilibrium.