His genius was formed chiefly by the influence of Nature, and, in a qualified degree, by that of the simple peasant people of the region. Already as a boy, though normal and active, he began to be sensitive to the Divine Power in Nature which in his mature years he was to express with deeper sympathy than any poet before him.
He stated his theory definitely and at length in a preface to the second edition of 'Lyrical Ballads' a discussion which includes some of the finest general critical interpretation ever made of the nature and meaning of poetry. Wordsworth declared: 1.Since the purpose of poetry is to present the essential emotions of men, persons in humble and rustic life are generally the fittest subjects for treatment in it, because their natures and manners are simple and more genuine than those of other men, and are kept so by constant contact with the beauty and serenity of Nature. 2.Not only should artificial poetic diction (like that of the eighteenth century) be rejected, but the language of poetry should be a selection from that of ordinary people in real life, only purified of its vulgarities and heightened so as to appeal to the imagination.