"The Private Memoirs and Confessions of a Justified Sinner" is a novel by the Scottish author James Hogg, published anonymously in 1824. It is a gripping tale of religious fanaticism and diabolical influence set against the backdrop of the Scottish landscape. The narrative is presented in two distinct parts: the editor's account of the events and the memoir of Robert Wringhim, a young man who falls under the spell of a mysterious companion, Gil-Martin. Wringhim's memoir reveals his descent into madness and despair, influenced by his belief in predestination and his own sense of moral infallibility, justified by a Calvinist doctrine that he interprets as assurance of his salvation, regardless of his actions. The novel delves deep into themes of duality, the nature of evil, and psychological torment, pioneering elements of the psychological thriller genre. Hogg's work is notable for its complex narrative structure and its early exploration of unreliable narration. It has been interpreted as a critique of Calvinist theology and is admired for its ahead-of-its-time insights into the dark side of human nature.