The "Utopia" that Plato wants to establish is a world in which humans and gods are harmonious: humans must restrain their sensibility and exalt their rationality in order to achieve spiritual enlightenment. Poets often lose control of reason and express their sensibility and desire.
“He (the poet) will inspire and cultivate the inferior elements of the soul, and the strengthening of the inferior elements of the soul will lead to the destruction of the rational part, just like handing over the power of a city-state to bad people will subvert it. The city-state endangers the good people in the city-state."
Plato himself was also an outstanding poet. He put himself into the situation and examined the production and operation process of poetry, and concluded that poetry is a kind of "letting go" and The theory of blind existence without reason.
Plato understood the genius of poets, but also despised their wildness; he yearned for the ghosts of poetry, but also hated the bohemianism of poetry that rejected reason. Like a wild horse running wild, poetry runs on the wasteland of passion, not restricted by the shepherd, regardless of the cliffs ahead, and indulges in a moment of carnival.
They accepted the stories that had been passed down from generation to generation without thinking, thinking that they were unbreakable truths. They never thought that they needed to dig deep, carefully distinguish, and pursue the background of knowledge. The poet lacks the positive attitude to correctly understand the world and the enterprising consciousness to create. It is impossible to open up people's minds, deepen people's understanding and cultivate the habit of seeking knowledge through his own actions.