_An Essay._] The poem is in one book, but divided into three principal parts or members. The first, to ver. 201, gives rules for the study of the art of criticism: the second, from thence to ver. 560, exposes the causes of wrong judgment: and the third, from thence to the end, marks out the morals of the critic. In order to a right conception of this poem, it will be necessary to observe, that though it be entitled simply An Essay on Criticism, yet several of the precepts relate equally to the good writing as well as to the true judging of a poem. This is so far from violating the unity of the subject, that it preserves and completes it: or from disordering the regularity of the form, that it adds beauty to it, as will appear by the following considerations: 1. It was impossible to give a full and exact idea of the art of poetical criticism, without considering at the same time the art of poetry; so far as poetry is an art. These therefore being closely connected in nature, the author has, with much judgment, interwoven the precepts of each reciprocally through his whole poem. 2. As the rules of the ancient critics were taken from poets who copied nature, this is another reason why every poet should be a critic: therefore as the subject is poetical criticism, it is frequently addressed to the critical poet. And 3dly, the art of criticism is as properly, and much more usefully exercised in writing than in judging. But readers have been misled by the modesty of the title, which only promises an art of criticism, to expect little, where they will find a great deal,--a treatise, and that no incomplete one, of the art both of criticism and poetry. This, and the not attending to the considerations offered above, was what, perhaps misled a very candid writer, after having given the Essay on Criticism all the praises on the side of genius and poetry which his true taste could not refuse it, to say, that "the observations follow one another like those in Horace's Art of Poetry, without that methodical regularity which would have been requisite in a prose writer." Spect. No. 235. I do not see how method can hurt any one grace of poetry: or what prerogative there is in verse to dispense with regularity. The remark is false in every part of it. Mr. Pope's Essay on Criticism, the reader will soon see, is a regular piece, and a very learned critic has lately shown that Horace had the same attention to method in his Art of Poetry. See Mr. Hurd's Comment on the Epistle to the Pisos.[297] Ver. 1. _'Tis hard to say, &c._] The poem opens, from ver. 1 to 9, with showing the use and seasonableness of the subject. Its use, from the greater mischief in wrong criticism than in ill poetry--this only tiring, that misleading the reader. Its seasonableness, from the growing number of bad critics, which now vastly exceeds that of bad poets.