Mental health is defined as a state of balance and harmony between an individual and their environment where one can effectively meet human needs and function in their culture. Key aspects of mental health include adequate contact with reality, emotional maturity, social acceptance, and the ability to solve problems and make decisions independently. Mental illness is a maladjustment that causes disharmony and the inability to meet needs or societal expectations, characterized by distress, suffering, and disturbances in daily life and relationships.