The book "On the Psychopathology of Everyday Life: On Forgetting, Promise, Mistake, Belief and Error" by the outstanding Austrian psychoanalyst Sigmund Freud is one of the classic works of psychology. In this work, the author examines the most common situations that arise in the everyday life of every person, analyzing the causes of forgetfulness, promises, mistakes, superstitions and other imperceptible phenomena. Freud examines such aspects of everyday life as forgetting simple things, small promises, mistakes in language, as well as the psychological aspects of superstitions and delusions. He shows how insignificant situations in themselves can reveal deep psychological processes in human thinking and behavior. This book not only helps to understand the mental mechanisms that govern our actions in everyday life, but also reveals to the reader the unique way of thinking of the great psychoanalyst. "On the psychopathology of everyday life" remains an eternal source of study of the human psyche and its nuances in ordinary life situations.