What strikes us from the very first in Wordsworth's vindication of Naturalism is his confounding of two things--prose, and what he calls "ordinary language" terms which he applies indiscriminately. Good prose is language which has been purified from the vain and meaningless repetitions and the uncertain, halting phraseology which are the inevitable outcome of the confusion due to insufficient education. Wordsworth has too frequently neglected this purifying process, when introducing dramatic dialogue into his own poems. It is this unfortunate passion for the most grovellingly exact imitation, which produces the sudden and disagreeable transitions from passages in a noble, elevated style, to passages with no style at all. See, for example, _The Blind Highland Boy_. "Poetry," says Wordsworth, "takes its origin from emotion recollected in tranquillity." The aim of the poet is the truthful imitation of nature, with the one restriction, that of the necessity of giving pleasure--not merely the straightforward, direct truth; therefore he employs the metrical form of composition, which provides the reader with small, but continual and regular impulses of pleasurable surprise. Metre produces its effect by continually arousing and satisfying curiosity, but in such a simple manner that it does not draw any separate attention to itself. It acts powerfully but unobservedly upon the mind, like artificially altered air, or the wine drunk during an eager discussion. By its steady recurrence it tempers and modifies the excitement or pain produced by the intelligence communicated; and by its tendency to divest language of its reality, it throws a sort of half consciousness of unsubstantial existence over the whole composition. Except for this, declares Wordsworth, even the best poetry can in no respect differ from prose. He forgets to ask himself if there are not numbers of common phrases and expressions which, though they are perfectly allowable in prose, would produce a most unpleasant effect in poetry; and forgets, too, to ask if it is not possible that in every serious poem there may occur, without any artificiality, sentences of a construction, and imagery of a kind, which would be impossible in prose. The only way in which the best poetry corresponds with "the very language of men," is in its expressions resembling those which some few of the most highly cultivated would use on the rarest occasions. In daily converse language wanders unrestrainedly; in public speech it is restrained by imperative connection and continuity of thought; in the prose work, the carefully elaborated sentence progresses naturally through all its twists and turnings; in verse, the form cannot be too exquisite or too compact. Here the doctrine applies which Théophile Gautier preached in his splendid poem, _L'Art_:-- "Oui, l'œuvre sort plus belle D'une forme au travail Rebelle, _Vers_, marbre, onyx, émail!