"When Nietzsche Wept" is a novel by Irvin D. Yalom that imagines a fictional meeting between the philosopher Friedrich Nietzsche and the physician Joseph Breuer in 19th-century Vienna. The story explores themes of suffering, love, and the human condition as Breuer attempts to treat Nietzsche's emotional turmoil while grappling with his own struggles. The narrative intertwines the lives of historical figures, including Sigmund Freud, who is referenced as a contemporary of Breuer. Through their conversations, the novel delves into the complexities of mental health and the philosophical inquiries that shaped modern psychology, ultimately highlighting the transformative power of empathy and understanding.