[Carl Jung on The Practice of Psychotherapy]
The patient is there to be treated and not to verify a theory. For that matter, there is no single theory in the whole field of practical psychology that cannot on occasion be proved to be basically wrong.
In particular, the view that the patient's resistances are in no circumstances) justified is completely fallacious. The resistance might very well prove that the treatment rests on false assumptions. ~"Fundamental Questions of Psychotherapy" (1951). In CW 16: The Practice of Psychotherapy. P.237
No analysis is capable of banishing all unconsciousness forever. The analyst must go on learning endlessly, and never forget that each new case brings new problems to light and thus gives rise to unconscious assumptions that have never before been constellated.
We could say, without too much exaggeration, that a good half of every treatment that probes at all deeply consists in the doctor's examining himself, for only what he can put right in himself can he hope to put right in the patient.
It is no loss, either, if he feels that the patient is hitting him, or even scoring off him: it is his own hurt that gives the measure of his power to heal. This, and nothing else, is the meaning of the Greek myth of the wounded physician. ["Fundamental Questions of Psychotherapy," ibid. para. 239.]