There are moments in life where the question of knowing whether one might think otherwise than one thinks and perceive otherwise than one sees is indispensable if one is to continue to observe or reflect... What is philosophy today... if it does not consist in, instead of legitimizing what we already know, undertaking to know how and how far it might be possible to think otherwise?... The ‘essay' -which must be understood as a transforming test of oneself in the play of truth and not as a simplifying appropriation of someone else for the purpose of communication-is the living body of philosophy, if, at least, philosophy is today still what it was once, that is to say, an askesis, an exercise of the self, in thought.