Abstract: Agnès Rees connects the question of the naturalness of La Boétie’s language to that of its clarity and self-evidence : studying the theme of vulgar language as natural language in sixteenth-century French humanism and linking it to rhetorical forms in the construction of self-evident discourse, she shows that self-evidence is not only a mode of the Discours but also one of its central themes, the figures of visual self-evidence thus rejoining the “natural use” of language.