Georges Canguilheim, who was Foucault's teacher, presents the set of these essays, of extraordinary richness and breadth, with this reflection:
"The time has come to apply to the work of Foucault the methods of clarification, that is, the genealogy and the interpretation that he himself applied to his fields of study."
Those who intervened seemed to agree, without premeditation, to accept the impossibility of asking Foucault questions without taking into account what he himself stated in his introduction to L'usage des plaisirs, namely, that the object of his work - "the games of truth" - ... could only be treated by testing the "living body of philosophy".
The essays in this volume analyze the place of Foucault's thought in current philosophy, the specific style of his discourse, his concepts of power, the State and ethics, as well as the relationship between rationality and morals in his work.