Read it through once

Poetry is the spontaneous overflow of powerful feelings: it takes its origin from emotion recollected in tranquillity. The emotion is contemplated until, by a species of reaction, the tranquillity gradually disappears, and an emotion, kindred to that which was before the subject of contemplation, is formed; the mind does not rest until it has poured forth all that it feels. Poetry is the result of such a process; and as in the higher species of poetry the feeling makes a principal part of the effect, the recollection of emotion in tranquillity is necessary to the production of all such poetry.