The document discusses key concepts in mental health psychiatric nursing including mental health, mental illness, psychiatric nursing, the nurse-patient relationship, therapeutic use of self, and assertiveness. Mental health is defined as successful adaptation to stressors while mental illness involves maladaptive responses. Psychiatric nursing involves diagnosing and managing human responses to health problems using theories of human behavior. The nurse-patient relationship aims to promote patient insight and behavioral change through mutual respect. Therapeutic use of self requires self-awareness to effectively help others, using qualities like empathy, genuineness, and respect. Assertiveness involves communicating feelings and beliefs without denying others' rights.