As a result, Klein may have been reluctant to openly acknowledge the influence of Ferenczi on her thinking, for fear of being associated with his controversial ideas and potentially alienating herself from the psychoanalytic establishment. In addition, the tensions between Ferenczi and other influential psychoanalysts, such as Freud and Abraham, may have made it difficult for Klein to publicly embrace Ferenczi's ideas without risking professional ostracism.
However, while Klein may not have explicitly acknowledged Ferenczi's influence on her work, there is evidence to suggest that his ideas had a significant impact on her thinking. For example, Klein's emphasis on the importance of early relationships in shaping the development of the self and her use of play as a means of accessing the child's inner world can be seen as drawing on Ferenczi's ideas about the importance of empathy and responsiveness in the therapeutic process.
Moreover, the revival of interest in Ferenczi's work in the 1980s and 1990s has led to a greater appreciation of his contributions to psychoanalytic theory and practice, and many analysts today acknowledge the debt owed to him, including Klein.