Sandor Ferenczi's ideas are being rediscovered and appreciated for their contributions to the evolution of psychoanalysis. Both European and American psychoanalysts have led the way in the rehabilitation of Ferenczi's reputation, damaged by Ernest Jones's assertions that Ferenczi's dissidence was a function of his psychopathology. In the last twenty-five years, Jones's assertions have been successfully challenged. Now, the focus in Ferenczi scholarship has shifted to the significance of his ideas and methods for the evolution of psychoanalyses. Five areas of Ferenczi's seminal contributions are outlined: 1. An ethos of clinical experimentation and empirically based clinical theory; 2. introduction of clinical empathy; 3. analysis of trauma and difficult cases; 4. development of the “Confusion of Tongues” theory and “Relaxation Therapy”; and 5. laid the foundation for a relational perspective in psychoanalysis.