This bond is often of such intensity that we could almost speak of a ‘combination.’ When two chemical substances combine, both are altered. This is precisely what happens in the transference.
Jung advances the alchemical model of mutual transformation as the defining feature of the transference bond, departing from Freud’s effort to ward it off.
, The Practice of Psychotherapy: Essays on the Psychology of the Transference and Other Subjects, 1954thesis