The document discusses characteristics of the self according to contemporary literature. It defines the self as separate, self-contained, independent, consistent, unitary, and private. It explores how the self is distinct from others, can exist independently, and is consistent over time. The self is also described as the center of one's experiences and private in nature. Development of the self is influenced by one's own observations, feedback from others, and cultural values. The document also provides an overview of common mental health disorders in adolescents such as depression, anxiety disorders, and eating disorders.