This chapter explores the extensive influence of Sufi philosophy on the work of Doris Lessing, the most prominent and widely studied literary figure featured in this monograph. While previous scholarship has acknowledged Lessing’s engagement with Sufism—particularly through the teachings of Idries Shah, her spiritual mentor for over four decades—existing studies, while providing relevant perspectives are limited in scope and overlook important new material. This chapter contributes to the field in two significant ways. Firstly, it draws on newly available biographical material from In Gratitude by Jenny Diski, Lessing’s adopted daughter, which sheds light on the origins of Lessing’s interest in Sufism and includes previously unpublished insights. It also incorporates recent reflections from Tahir Shah, son of Idries Shah, offering fresh context on the intellectual and personal relationship between his father and Lessing. Second, this chapter presents original research into a largely unexamined aspect of Lessing’s spiritual influences: the impact of the Sufi teachings of G.I. Gurdjieff and J.G. Bennett on her fiction. By analysing these lesser-known influences, alongside an interview I conducted with Lessing in 2004, the chapter expands the current understanding of how Sufi thought and ideas shaped the philosophical underpinnings and narrative strategies of Lessing’s literary oeuvre.