C.G. Jung's 1911 work, A Contribution to the Knowledge of the Dream of Numbers (original German title "Ein Beitrag zur Kenntnis des Zahlentraumes"), delves into the symbolic and unconscious processes manifested through numbers in dreams, showing how numerical symbols encode complex psychological and emotional conflicts. Through detailed case studies, Jung illustrates how seemingly arbitrary numbers in dreams often reflect meaningful associations tied to the dreamer's personal experiences, relationships, and unconscious motivations. He emphasizes that numbers in dreams are not purely random, but rather function as symbols rooted in the unconscious, capable of revealing deep insights into the dreamer's inner conflicts.