Why didn't Zhuangzi sing in the face of his dead wife?

Zhuangzi is not ignorant of family ties and etiquette, but these are secondary to the fate of heaven and earth. We can't hinder the pursuit of the spirit of heaven and earth in order to abide by secular etiquette.

When Keiko came to offer condolences, he saw Zhuangzi singing and accused him. Zhuangzi said, "No, when she just died, how could I not be sad! However, I thought about it carefully. At first, she had no life, no body, no breathing, and she was mixed in a trance. It is precisely because of natural changes that there is breath, and with form, there is life if the form changes again. Now, she has changed and left. Birth, illness, death and illness are like the alternation of four seasons! Now, people lie comfortably between the huge heaven and earth. If I cry for her, I think it is impossible for heaven and earth, so I won't cry! "

From "Zhile", the original text is as follows:

When Zhuangzi's wife died, Keiko hung and Zhuangzi sang in the drum basin. Keiko said, "If you live with people, your eldest son will die of old age and physical death. It is enough not to cry, but also to sing with drums!" " Zhuangzi said, "Otherwise. Finish what you started, I can't be alone! However, if we look at its beginning, there is no life; Non-life is also intangible; No migration is intangible and lifeless. Between hetero-fluorenes, it turns into gas, gasifies into tangible, and becomes deformed and alive. Now it's changed and dead. Four o'clock is the same as spring, summer, autumn and winter. People were lying in a huge room, and I cried with it, thinking that I couldn't live any longer, so I stopped. "