There is one statement by Derrida—in an essay on Rousseau in "Of Grammatology"—which has been of great interest to his opponents. It is the assertion that "there is no outside-text" ("il n'y a pas de hors-texte"), which is often mistranslated as "there is nothing outside of the text". The mistranslation is often used to suggest Derrida believes that nothing exists but words. Michel Foucault, for instance, famously misattributed to Derrida the very different phrase "Il n'y a rien en dehors du texte" for this purpose. According to Derrida, his statement simply refers to the unavoidability of context that is at the heart of différance.