The text discusses examples of human systems with either too open or closed boundaries, and how energy within these systems always has a goal. It also mentions a book that explains how to apply system theory in finding solutions and creating change. Other topics include binary codes within systems and prioritization of certain systems over others. The importance of combining system theory with other approaches is also highlighted. The text also briefly mentions interviews conducted in a school setting to better understand the concept of system theory. Potential difficulties in applying system theory are also addressed. In addition, the text mentions Volvo as an example of internal and external customers and discusses the concept of system theory as it relates to human behavior.