The author emphasizes the importance of the conditions to be respected for the emergence of symbolization work. The question of primary symbolization and deficiencies which may have accompanied it in the initial encounters with the object becomes the basis upon which the questions of setting and transference are brought up. The dimension of the contact matrix and the function of the respondent are then most particularly studied insofar as they represent invaluable tools for taking into account the impact of the relationship of temporality to the waning of the psychotherapeutic dynamic. The emergence of symbolization work cannot occur without comparing the rhythms that the institutional reality is in a position to contain, a function complementary to the dynamic of subjective appropriation engendered by the analytic situation.