sentences:  Crews also credited Ellenberger with a biographical understanding of Freud that "set a standard that contemporary scholars are still trying to match", and with revising older estimates of Freud's level of originality and encouraging subsequent scholars to question the scientific validity of psychoanalysis.The historian Peter Gay described "The Discovery of the Unconscious" as useful despite Ellenberger's lack of sympathy for Freud.Gay called the book a "thoroughly researched" volume that was far more comprehensive than Lancelot Law Whyte's "The Unconscious before Freud" (1960).