Everything in nature, including humans, have Yin and Yang aspects. Yin and Yang flow harmoniously creating balance. Yin and Yang need each other to survive.  If we focus on these principles knowing that after the darkness, light will follow, we can create more peace in our lives. When we have been very active, rest follows. When we have been very fluid and going with the flow like water for a while, we sometimes need to stop and find some fiery passion. Once night ends, day follows, and vice versa. It is ever changing so we can find peace in knowing that after the hard times, good times will follow. If you are finding yourself heavily on one side of the Yin Yang spectrum and feeling out of balance, you can simply bring in the opposite characteristics to create a more harmonious existence.