Yin and yang are not opposites. They complement one another. The long complements the short. The wet complements the dry. The night complements the day. People create evil out of their desire to create good. Thus, we can have without possessing. We can know without knowing. We can do without doing. There are many grays in a world where many try to define it in black and white. There is always white in black, and black in white.