This document discusses the development of self from infancy through adulthood. It covers how self-awareness emerges around 17-24 months as infants begin to recognize themselves in mirrors. Culture influences when self-recognition occurs. During childhood, self-concept is formed based on physical and academic attributes, and adolescents struggle with developing identity. Adulthood brings changes to self-concept through life experiences like marriage and career. Work plays a role in adult identity and self-esteem is influenced by social comparisons and evaluations of how one measures up to standards and peers.