Read it through once

Some beauties yet no precepts can declare, For there's a happiness as well as care. Music resembles poetry--in each Are nameless graces which no methods teach, And which a master hand alone can reach If, where the rules not far enough extend (Since rules were made but to promote their end), Some lucky license answer to the full The intent proposed that license is a rule. Thus Pegasus a nearer way to take May boldly deviate from the common track Great wits sometimes may gloriously offend, And rise to faults true critics dare not mend, From vulgar bounds with brave disorder part, And snatch a grace beyond the reach of art, Which without passing through the judgment gains The heart and all its end at once attains. In prospects, thus, some objects please our eyes, Which out of nature's common order rise, The shapeless rock or hanging precipice. But though the ancients thus their rules invade (As kings dispense with laws themselves have made), Moderns beware! or if you must offend Against the precept, ne'er transgress its end, Let it be seldom, and compelled by need, And have, at least, their precedent to plead. The critic else proceeds without remorse, Seizes your fame, and puts his laws in force.