Jeffrey Moussaieff Masson’s "The Assault on Truth" investigates a pivotal shift in Sigmund Freud’s early career, specifically his abandonment of the seduction theory. Masson argues that Freud originally believed his patients' accounts of childhood sexual abuse were factual, a view supported by Freud's exposure to forensic evidence of childhood trauma during his studies in Paris with Brouardel. However, Freud eventually retreated from this position, reclassifying these real-life traumas as internal fantasies and unconscious wishes. The text highlights the tragic case of Emma Eckstein, a patient who suffered a nearly fatal surgical complication at the hands of Freud’s friend, Wilhelm Fliess. Masson contends that Freud’s subsequent attempt to blame Eckstein’s hemorrhaging on hysteria rather than medical malpractice mirrors his broader failure of moral courage. Ultimately, the author suggests that this transition laid the foundation for modern psychoanalysis by prioritizing the patient's imagination over the reality of sexual violence.