In addition to his poetry, Coleridge also wrote influential pieces of literary criticism including Biographia Literaria, a collection of his thoughts and opinions on literature which he published in 1817. The work delivered both biographical explanations of the author's life as well as his impressions on literature. The collection also contained an analysis of a broad range of philosophical principles of literature ranging from Aristotle to Immanuel Kant and Schelling and applied them to the poetry of peers such as William Wordsworth. Coleridge's explanation of metaphysical principles were popular topics of discourse in academic communities throughout the 19th and 20th centuries, and T.S. Eliot stated that he believed that Coleridge was "perhaps the greatest of English critics, and in a sense the last." Eliot suggests that Coleridge displayed "natural abilities" far greater than his contemporaries, dissecting literature and applying philosophical principles of metaphysics in a way that brought the subject of his criticisms away from the text and into a world of logical analysis that mixed logical analysis and emotion. However, Eliot also criticises Coleridge for allowing his emotion to play a role in the metaphysical process, believing that critics should not have emotions that are not provoked by the work being studied. Hugh Kenner in Historical Fictions, discusses Norman Fruman's Coleridge, the Damaged Archangel and suggests that the term "criticism" is too often applied to Biographia Literaria, which both he and Fruman describe as having failed to explain or help the reader understand works of art. To Kenner, Coleridge's attempt to discuss complex philosophical concepts without describing the rational process behind them displays a lack of critical thinking that makes the volume more of a biography than a work of criticism.
In Biographia Literaria and his poetry, symbols are not merely "objective correlatives" to Coleridge, but instruments for making the universe and personal experience intelligible and spiritually covalent. To Coleridge, the "cinque spotted spider," making its way upstream "by fits and starts," [Biographia Literaria] is not merely a comment on the intermittent nature of creativity, imagination, or spiritual progress, but the journey and destination of his life. The spider's five legs represent the central problem that Coleridge lived to resolve, the conflict between Aristotelian logic and Christian philosophy. Two legs of the spider represent the "me-not me" of thesis and antithesis, the idea that a thing cannot be itself and its opposite simultaneously, the basis of the clockwork Newtonian world view that Coleridge rejected. The remaining three legs—exothesis, mesothesis and synthesis or the Holy trinity—represent the idea that things can diverge without being contradictory. Taken together, the five legs—with synthesis in the center, form the Holy Cross of Ramist logic. The cinque-spotted spider is Coleridge's emblem of holism, the quest and substance of Coleridge's thought and spiritual life.
Coleridge and the influence of the Gothic
Coleridge wrote reviews of Ann Radcliffe's books and The Mad Monk, among others. He comments in his reviews: "Situations of torment, and images of naked horror, are easily conceived; and a writer in whose works they abound, deserves our gratitude almost equally with him who should drag us by way of sport through a military hospital, or force us to sit at the dissecting-table of a natural philosopher. To trace the nice boundaries, beyond which terror and sympathy are deserted by the pleasurable emotions, – to reach those limits, yet never to pass them, hic labor, hic opus est." and "The horrible and the preternatural have usually seized on the popular taste, at the rise and decline of literature. Most powerful stimulants, they can never be required except by the torpor of an unawakened, or the languor of an exhausted, appetite... We trust, however, that satiety will banish what good sense should have prevented; and that, wearied with fiends, incomprehensible characters, with shrieks, murders, and subterraneous dungeons, the public will learn, by the multitude of the manufacturers, with how little expense of thought or imagination this species of composition is manufactured."
However, Coleridge used these elements in poems such as The Rime of the Ancient Mariner (1798), Christabel and Kubla Khan (published in 1816, but known in manuscript form before then) and certainly influenced other poets and writers of the time. Poems like these both drew inspiration from and helped to inflame the craze for Gothic romance. Coleridge also made considerable use of Gothic elements in his commercially successful play Remorse.
Mary Shelley, who knew Coleridge well, mentions The Rime of the Ancient Mariner twice directly in Frankenstein, and some of the descriptions in the novel echo it indirectly. Although William Godwin, her father, disagreed with Coleridge on some important issues, he respected his opinions and Coleridge often visited the Godwins. Mary Shelley later recalled hiding behind the sofa and hearing his voice chanting The Rime of the Ancient Mariner.