By the last third of the century, a growing consensus appeared on the importance of 'a distinction between "personal countertransference" (what has to do with the therapist) and "diagnostic response" - that indicates something about the patient...diagnostic countertransference'<ref>Casement, ''Further learning'' p. 8 and p. 165</ref>.  A new belief had come into being that 'countertransference can be of such enormous clinical usefulness....You have to distinguish between what your reactions to the patient are telling you about his psychology and what they are merely expressing about your own'<ref>"Aaron Green", quoted in Janet Malcolm, ''Psychoanalysis: the impossible profession''(London 1988), p. 115</ref>.  Awareness of the distinction between  ' ''neurotic countertransference'' - which...Fordham calls ''illusory countertransfernce'' - the personal countertransference or narrow perspective - '[and] ''countertransference proper'' '<ref>Mario Jacoby, ''The Analytic Encounter'' (Canada 1984) p. 38</ref> had come (despite a wide range of terminological variation) to transcend individual schools. The main exception is that for 'most psychoanalysts who follow Lacan's teaching...counter-transference is not simply one form of resistance, it is ''the'' ultimate resistance of the analyst'<ref>Jean-Michel Quinodoz, ''Reading Freud'' (London 2005) p. 72</ref>.

By the last third of the century, a growing consensus appeared on the importance of 'a distinction between "personal countertransference" (what has to do with the therapist) and "diagnostic response" - that indicates something about the patient...diagnostic countertransference'<ref>Casement, ''Further learning'' p. 8 and p. 165</ref>.  A new belief had come into being that 'countertransference can be of such enormous clinical usefulness....You have to distinguish between what your reactions to the patient are telling you about his psychology and what they are merely expressing about your own'<ref>"Aaron Green", quoted in Janet Malcolm, ''Psychoanalysis: the impossible profession''(London 1988), p. 115</ref>.  Awareness of the distinction between  ' ''neurotic countertransference'' - which...Fordham calls ''illusory countertransfernce'' - the personal countertransference or narrow perspective - '[and] ''countertransference proper'' '<ref>Mario Jacoby, ''The Analytic Encounter'' (Canada 1984) p. 38</ref> had come (despite a wide range of terminological variation) to transcend individual schools. The main exception is that for 'most psychoanalysts who follow Lacan's teaching...counter-transference is not simply one form of resistance, it is ''the'' ultimate resistance of the analyst'<ref>Jean-Michel Quinodoz, ''Reading Freud'' (London 2005) p. 72</ref>.