This document is a student paper on Aristotle's theory of catharsis. It discusses how Aristotle used the term "catharsis" in his definition of tragedy. Catharsis refers to the purification and release of emotions, especially pity and fear, that occurs when watching a tragedy. The paper also examines different interpretations of catharsis, including medical, psychological, purification and clarification theories. It argues that catharsis provides pleasure by allowing viewers to experience and release pity and fear in a safe way through the artistic medium of tragedy.