T. S. Eliot had a theory about poetry, which he explained in an essay called Tradition and the Individual Talent. “Most of us,” Eliot wrote, “think of poets as people who express their feelings in verse.” He thought poetry was stranger than that. As Eliot saw it, poets were less like people and more like laboratories. “The poet has, not a ‘personality’ to express,” he wrote, “but a particular medium . . . in which impressions and experiences combine in peculiar and unexpected ways.” Within this medium, ordinary emotions are compressed together until they produce an “art emotion”—an emotion that doesn’t exist in ordinary life, and is available only through the poem. That’s the whole point of poetry: while we’re under its spell, we’re not ourselves, or anyone; we feel things no ordinary person feels. “Poetry is not a turning loose of emotion, but an escape from emotion; it is not the expression of personality, but an escape from personality,” he concluded.
The above is quoted from a New Yorker article.