I want to explore the notion of ‘mutual introjection, the developmental essence of an autobiographical dialogue’, an idea that has recently crystallized in the continuing collaborative work of Gershon J. Molad of Israel and myself concerning the autobiographical contribution to the dialogue between analysts (Molad & Vida 2002). One of the sources of this crystallization is the experience of my consultative relationship with a Jungian colleague, who, after reading some of this collaborative work, paraphrased Jung's implication that if, in the course of treatment, the doctor is not as transformed as the patient, nothing has happened (1946). In this paper, I want to breathe some life into these theoretical-sounding words: ‘mutual introjection, the developmental essence of an autobiographical dialogue’.