From the introduction by Seamus Heaney: Wordsworth's power over us stems from the manifest strength of his efforts to integrate several strenuous and potentially contradictory efforts. Indeed, it is not until Yeats that we encounter another poet in whom emotional susceptibility, intellectual force, psychological acuteness, political awareness, artistic self-knowledge and bardic representativeness are so truly and responsibly combined. He is an indispensable figure in the evolution of modern, a finder and keeper of the self as subject, a theorist and apologist whose preface to Lyrical Ballads 1802 remains definitive.