Wilfred Bion, a British psychoanalyst, was heavily influenced by the work of Melanie Klein and her followers for much of his career. However, in the 1960s, Bion began to develop his own unique approach to psychoanalysis, which departed from some of the key tenets of Kleinian theory.
One of the most significant differences between Bion's approach and Kleinian theory was his emphasis on the importance of the analyst's own emotional experiences in the therapeutic process. This led him to develop the concept of "container-contained," which emphasized the importance of the analyst's ability to "contain" the patient's emotions and experiences in a supportive and non-judgmental way.
Bion's ideas about the role of the analyst, and his emphasis on the importance of the analyst's own subjective experience, led some to view him as moving away from Kleinian theory. However, it is worth noting that Bion remained connected to the Kleinian community throughout his career, and continued to engage with Kleinian ideas and concepts even as he developed his own approach.
Overall, while Bion's work can be seen as a departure from some aspects of Kleinian theory, it is also important to recognize the ways in which his ideas were influenced by and built upon the work of Klein and her followers.
