Book excerpt: This book examines the nature of Freud's relationship to the philosopher Friedrich Nietzsche. Nietzsche regarded himself, among other things, as a psychologist. His psychological explorations included an understanding of the meaning and function of dreams, the unconscious, sublimation of drives, drives turned inward upon the self, unconscious guilt, unconscious envy, unconscious resistance, and much more that anticipated some of Freud's fundamental psychoanalytic concepts. Although Freud wrote of Nietzsche having anticipated psychoanalytic concepts, he denied that Nietzsche had any influence on his thought.