1. The document discusses William James' theory of the material self, which refers to the tangible elements that comprise one's identity, including one's body, clothes, immediate family, and home. 2. It provides examples of how people invest themselves in their material possessions and see them as part of their self, such as feeling victories or failures of family as their own and having strong attachments to certain body parts and homes. 3. The document instructs students to do an activity where they list items they would buy with a debit card and to categorize them as relating to body, clothes, family, or home to understand how material possessions shape one's self-concept.