This document discusses understanding oneself during middle and late adolescence. It explains that knowing one's strengths and limitations through self-reflection can help one accept themselves and relate better to others. It describes the concepts of actual self, which is how one truly is, ideal self, which is who one aspires to be, and self-concept, which negotiates these two selves. Understanding oneself comes from self-knowledge gained through social interactions. Students are encouraged to journal about insights and actions they can take to improve themselves.