On December 16th 2017 the Association de la Cause Freudienne, Val de Loire-Bretagne invited Laure Naveau to give a public conference entitled "The Desire to Know", which was aimed to address a question about the particular nature of the desire to know in psychoanalysis. What supports it? What does it consist of? How is it articulated? Starting from the Freudian discovery, through the analysis of "Disturbance of Memory on the Acropolis", Laure Naveau then goes through the case of the little Hans, evaluating the myths that he invents which elaborate a knowledge that helps him to take leave of his phobia. It evokes finally the evolution of that concept in Lacan's teaching, the arrival at the formulation of a new desire for emergent knowledge at the end of the analysis. The pass is a demonstration of that unprecedented desire - the analyst's desire.