In his "Republic," Plato explains that poetry is thrice removed from the truth: the poet imitates the world, which is itself an imitation of the ideal forms. Therefore, poetry does not lead to true knowledge or understanding.
Plato believes that poetry appeals to the irrational part of the soul, stirring up emotions and passions that can overwhelm reason. This emotional influence undermines the rational part of the soul.
Plato criticizes poets for lacking true knowledge. He contends that poets speak about various subjects as if they have expertise, but in reality, they have no genuine understanding or knowledge about them. They create illusions of wisdom without possessing actual wisdom.