What's there in the head and three feet? There is a god! Don't laugh at me for being superstitious. What happened to me is beyond my understanding. All things in heaven and earth have spirits. What is the position of human beings among all spirits? I grew up studying materialism and atheism, but some of the people and things I encountered impacted my worldview little by little. Do the underworld people and immortals in novels exist in real life? If so, how does science explain these superstitious things? If not, what did I encounter? Does existence have to be reasonable?