Mimesis (Imitation): Aristotle believes that poetry, especially tragedy, is an imitation of action and life. He asserts that humans have an innate propensity for imitation and that they learn and derive pleasure from it. For Aristotle, poetry's value lies in its ability to represent and imitate reality, thereby providing both enjoyment and educational value.
Rhetoric vs. Poetics: Rhetoric, on the other hand, is treated separately by Aristotle in his work "Rhetoric." While rhetoric deals with persuasion in speech and writing, poetics deals with the artistic creation and representation in poetry. Aristotle’s "Poetics" does not focus on rhetoric; rather, it concentrates on how poetry imitates life and evokes emotions like pity and fear, leading to catharsis.