
The reality of good and evil is that all actions contain some aspect of each. This is represented in the t'ai chi, more commonly referred to as the yin-yang symbol. Any action would have some negative (yin) and some positive (yang) aspect to it. Taoists believe that nature is a continual balance between yin and yang, and that any attempt to go toward one extreme or the other will be ineffective, self-defeating, and short-lived. When people interfere with the natural balance by trying to impose their egoistic plans, they will not succeed; rather, the non-egoistic person allows nature to unfold, watching it ebb and flow from good to bad and back again.
-"What Taoists Believe"
Let It Be, Let It Be.