From the barely intelligible words spoken by the vast and heterogeneous unreasonable population studied in the Madness and Civilization, to the parrhesiastic practise, Socratic and cynical in particular, analyzed in the last courses at the Collège de France, all of Foucault’s work could also be considered as an attempt to establish the conditions that make capture of speech possible. A capture of speech, however, which is not just a repetition of statements that preceed and subject the speaker but rather an act of enunciation by speakers able to establish themselves as free subjects of a truthful speech.