Yin, as contraction, is the primal force behind all things that focus or pull inward. Darkness pulls in light, cold pulls in heat, emptiness - vacuum or void - pulls in substance.Yin is also seen in tranquility, peace, silence and depression.
Yang, as expansion, is the primal force behind all things that focus or push outwards. Light expands into darkness, heat radiates into cold, substance fills emptiness, and masculine looks out to the world. Yang is also seen in excitement, action, noise and destruction.
So understand YOU, YOUR LIFE, AND EVERYTHING AROUND YOU. Begin living your life in BALANCE, as a moving balance...like a wave that always comes back to the center.