The book Enchiridion Asceticum by M.J. Rouët de Journal, S.J., is a significant work in Catholic spiritual literature, primarily serving as a manual or handbook on ascetic theology and spiritual direction. The Enchiridion Asceticum is not a single continuous narrative, but rather a carefully curated collection and systematic organization of classic texts and teachings from prominent spiritual masters, particularly the Church Fathers. The term 'Enchiridion' (Greek for 'handbook' or 'manual') perfectly describes its function as a practical guide for those seeking to deepen their spiritual life, especially individuals in religious life such as priests and seminarians. In essence, the Enchiridion Asceticum functions as a fundamental resource for understanding and practicing traditional Catholic spirituality and asceticism, bringing together a vast body of spiritual wisdom into a single, accessible handbook.