In Bella yin and yang is very important. Usually you want to be yang. Because in Bella yin is the rich, noble, and high standard people. But if your yin your usually poor, sad, and have very few children or even none.
That's a true! Good things and bad things. Life can not live one of these things, but life needs both. Without bad things you never know when is good. ''Bad things happen in life to teach us how to look at good things in a whole new light.