The author works on the difficulties that present themselves in the transmission of knowledge within the framework of cultural filiation, difficulties that are due to the negation of the ties of bodily and familial filiation.The transmission of cultural filiation is achieved through spaces of transition, just as bodily and familial transmission occurs through narcissistic and negative contacts and pacts which have functions of intermediate ties. When the familial filiation or bodily filiation are not in a position to ensure the continuity of psychic life, it is the cultural filiation that takes over the task.A psychoanalytic therapy with a mixed couple helps to illustrate why the maternal language is operative as an epistemological obstacle for both partners and in the choice of an analyst of Hispanic origin. This choice permitted the deployment in the transference/countertransference field of the difficulties of transmission as the consequences of social and family traumas, and helps us to understand what brought this couple together. It was the hope of finding in the other a filiative manager making it possible to avoid looking at the blind points of a personal history branded in the body and in the relationship itself.