The sadness in my heart when I read the holy name of Nandiwang Bodhisattva may be caused by many reasons, such as depression, excessive pressure, excessive fatigue and so on.

In this case, I suggest you try other ways to relieve your inner sadness and pressure, such as communicating with family and friends, doing proper exercise, listening to music or doing something that interests you. At the same time, you can also consider seeking the help of a psychological counselor to better handle your inner problems and emotions.