In this chapter, the author attempts to describe the "Stream of mindfulness". First of all, the author thinks deeply about solving the mystery of the marks on the wall, representing the interest of the individual's mind and the height of the human psychological process. In order to solve a small mystery, the human mind plunges into an unimaginable depth. A smaller secret, "The mark on the wall," allows her to delve into history, Shakespeare's writings, traditional norms, etc. All these ideas will enable her to look deeper into the future. Thus, she discusses how nature penetrates our thought processes and stimulates us to take action, and tells us the infinite and infinite nature of human thought in terms of action.