The author discusses the lifelong impact of adolescence in shaping the adult psyche. Some patients may appear to be as influenced by conflicts of adolescence and the individual solutions arrived at during this period as they are by conflicts and solutions of the oedipal phase, the author maintains. The subphases of early, middle, and late adolescence are discussed both in terms of a review of the psychoanalytic literature and of representative works of literary fiction. Illustrative clinical vignettes are presented as well.