This essay seeks the secret motivation behind Ingeborg Bachmann's writing and sheds light on a number of mysteries surrounding his life. It appears that the work is placed under the sign of a problematic unveiling: how and by what literary means to shape an unspeakable truth? The letters to his Austrian Jewish mentor Hans Weigel, unpublished and little commented on, reveal an unsuspected reality and shed new light on his relationship to Paul Celan. From correspondence to correspondence reveals herself to be a sick, fragile, lonely writer, but endowed with exceptional resilience and courage in the willingness to wrestle every page with a high struggle from the silence imposed by repressed trauma.