The term "Containing," coined by W.R. Bion, encompasses the psychological development and mental reality of the individual, as well as interpersonal and affective exchange processes within the same model. At its core is the transformation of primitive emotional experiences into more abstract, mentally accessible constructs. According to Bion, psychotherapists provide their psyche as a dynamic container, allowing patients to endure and "digest" unbearable affects—a process that begins in early mother-child interactions and is later internalized, enabling emotional growth throughout the lifespan. In clear language and with illustrative clinical case examples, Gianluca Crepaldi explains and updates the classic psychoanalytic concept of Containing, demonstrating its relevance for today's context.