Change during analysis is here understood as the possibility of elaborating the 'biological bedrock' described by Freud as the repudiation of femininity in both sexes. The analysis of a man with anxiety hysteria permits us to show how temporal regression induced by the analytic setting enables the elaboration of passivity in its fantasy and object-related aspects. The return of this patient seven years after the end of the analysis in a moment of strange coincidence for the analyst, gave rise to a consideration of the difficulties and the issues in topographical and formal regression during analysis: the necessity of working on the dynamics of the narcissistic double and on the anxieties relating to the danger of non-representation and the loss of the capacity for investment. The working through of this primordial passivity, corresponding to active work, concerns analyst as well as analysand in their common work and constitutes the final point which all analyses should reach to achieve a durable change in its topographical, dynamic and economic aspects.