I have said that Poetry is the spontaneous overflow of powerful feelings: it takes its origin from emotion recollected in tranquillity: the emotion is contemplated till by a species of reaction the tranquillity gradually disappears, and an emotion, similar to that which was before the subject of contemplation, is gradually produced, and does itself actually exist in the mind. In this mood successful composition generally begins, and in a mood similar to this it is carried on; but the emotion, of whatever kind and in whatever degree, from various causes is qualified by various pleasures, so that in describing any passions whatsoever, which are voluntarily described, the mind will upon the whole be in a state of enjoyment. Now if Nature be thus cautious in preserving in a state of enjoyment a being thus employed, the Poet ought to profit by the lesson thus held forth to him, and ought especially to take care, that whatever passions he communicates to his Reader, those passions, if his Reader's mind be sound and vigorous, should always be accompanied with an overbalance of pleasure. Now the music of harmonious metrical language, the sense of difficulty overcome, and the blind association of pleasure which has been previously received from works of rhyme or metre of the same or similar construction, all these imperceptibly make up a complex feeling of delight, which is of the most important use in tempering the painful feeling which will always be found intermingled with powerful descriptions of the deeper passions. This effect is always produced in pathetic and impassioned poetry; while in lighter compositions the ease and gracefulness with which the Poet manages his numbers are themselves confessedly a principal source of the gratification of the Reader. I might perhaps include all which it is _necessary_ to say upon this subject by affirming what few persons will deny, that of two descriptions either of passions, manners, or characters, each of them equally well executed, the one in prose and the other in verse, the verse will be read a hundred times where the prose is read once. We see that Pope by the power of verse alone, has contrived to render the plainest common sense interesting, and even frequently to invest it with the appearance of passion. In consequence of these convictions I related in metre the Tale of GOODY BLAKE and HARRY GILL, which is one of the rudest of this collection. I wished to draw attention to the truth that the power of the human imagination is sufficient to produce such changes even in our physical nature as might almost appear miraculous. The truth is an important one; the fact (for it is a _fact_) is a valuable illustration of it. And I have the satisfaction of knowing that it has been communicated to many hundreds of people who would never have heard of it, had it not been narrated as a Ballad, and in a more impressive metre than is usual in Ballads.