The document discusses the human being as a co-existence of self ("I") and body. It states that while physical facilities fulfill the body's needs, they do not fulfill the needs of the self, which experiences feelings like happiness and sorrow. Both the needs of the self and body must be fulfilled. The self communicates through knowledge, assumption, and recognition, while the body communicates by identifying and satisfying needs. Human activities can be categorized as those occurring in the self, those occurring in the body, and those involving both. The self includes experiences, understanding, desires, thinking, and selection.