In this chapter, the reader is introduced to the concept of "flow" and the "structural strength" of the human body. The reader is reminded of the analogy between the structure of a fish and the strength of a human body, and he is reminded again of the dangers of fighting against the flow. He is reminded that he is surrounded by space, and that he will have to dodge attacks from other humans. He realizes that he has to be brave in order to survive the attacks, but he does not know how to respond to them.