The document discusses the complexity of human communication through the use of symbols. It provides examples of religious symbols like the swastika, pentagram, and various Christian symbols. Symbols allow humans to discuss abstract concepts and events that are not physically present. The document also discusses how symbols are used to represent sacred time and space in different cultures. Religions use calendars, rituals, and myths connected to landmarks to establish supernatural worlds and meanings. Overall, the document examines how symbols facilitate complex human communication, especially in religious contexts, by representing ideas and concepts that cannot be directly observed.