As a Daoist, I would leave my father alone. In being left alone, he will discover through nature that he was wrong and rectify the situation. I would also realize, this world is full of balance. To have good, there must be bad. True harmony comes from the Yin and Yang being balanced in nature. I wouldn't want to feel self-important by interfering. The Dao Jing tells us, "Be weak. Let things alone." I will accept what comes. In order to have pleasure, I must deal with the pain of my father's wrongdoing. I will continue with my simple life, and meditate quietly each day.