Tragedy is the main concern of Aristotle in Poetics and it is the utmost argued and debated subject. According to Plato, tragedy has a damaging and detrimental result on the soul in that it caters to the feelings and passions that ruin its logical side.
Aristotle's concept of imitation
Aristotle’s theory of Imitation and Catharsis | Aristotle’s Poetics
Aristotle’s “Poetics” is an important work in the history of English literary criticism. It was developed as an extension together with an evaluation of Plato’s “Republic”. According to Plato, mimesis was a delusion, a false copy that was far removed from reality. On the other hand, according to Aristotle, mimesis was “natural”.