One of the principal figures of the Romantic movement, John Keats belonged to the second generation of Romantic poets, alongside Percy Shelley and Lord Byron. Having received little formal education, Keats was initially apprenticed to a surgeon, and he eventually broke off his apprenticeship to work as a dresser, becoming more involved in the literary realm as he began to dabble in poetry in 1814. By 1817, his literary interests had come to fruition, and he left his position to dedicate himself entirely to poetry. Early in his writing career, Keats was influenced by the writings of Wordsworth and Spenser, as well as Chapman's translations of Homer. The year 1818 was tumultuous for Keats, experiencing worsening tuberculosis symptoms while falling in love with Fanny Brawne, the two becoming engaged later that year. Keats died of tuberculosis in Rome before he could marry Brawne. Although he had achieved some acknowledgement during his lifetime, Keats was convinced that his poetry would attain no lasting significance, having experienced the harsh criticism of John Lockhart, derisively deeming Keats as a member of the vulgar "Cockney School." Despite the minimal success Keats experienced in his six short years as a writer, posthumously, he has become among the most critically acclaimed poets in English history, remembered for his vivid imagery, sensuality, and profound philosophical expressions informed by classical legend. In addition, Keats' articulation of "negative capability" (the capacity of a poet to pursue an artistic vision even when it leads to confusion and uncertainty) has influenced generations of poets. A very few of Keats' most notable works include his major odes, "The Eve of St. Agnes," "Hyperion," "The Fall of Hyperion," and "Lamia."