If I had undertaken a systematic defence of the theory upon which these poems are written, it would have been my duty to develop the various causes upon which the pleasure received from metrical language depends. Among the chief of these causes is to be reckoned a principle which must be well known to those who have made any of the Arts the object of accurate reflection; I mean the pleasure which the mind derives from the perception of similitude in dissimilitude. This principle is the great spring of the activity of our minds, and their chief feeder. From this principle the direction of the sexual appetite, and all the passions connected with it, take their origin: it is the life of our ordinary conversation; and upon the accuracy with which similitude in dissimilitude, and dissimilitude in similitude are perceived, depend our taste and our moral feelings. It would not have been a useless employment to have applied this principle to the consideration of metre, and to have shown that metre is hence enabled to afford much pleasure, and to have pointed out in what manner that pleasure is produced. But my limits will not permit me to enter upon this subject, and I must content myself with a general summary.
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, kindred 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, an indistinct perception perpetually renewed of language closely resembling that of real life, and yet, in the circumstance of metre, differing from it so widely, 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.
Having thus explained a few of the reasons why I have written in verse, and why I have chosen subjects from common life, and endeavoured to bring my language near to the real language of men, if I have been too minute in pleading my own cause, I have at the same time been treating a subject of general interest; and it is for this reason that I request the Reader’s permission to add a few words with reference solely to these particular poems, and to some defects which will probably be found in them. I am sensible that my associations must have sometimes been particular instead of general, and that, consequently, giving to things a false importance, sometimes from diseased impulses I may have written upon unworthy subjects; but I am less apprehensive on this account, than that my language may frequently have suffered from those arbitrary connections of feelings and ideas with particular words and phrases, from which no man
