Abstract
A text devoted to a study of the early Cartesian work, Regulae ad directionem ingenii. Very few authors deal exclusively with the Regulae, and even fewer try to read it as a unity. Marion aims at both. He contends that the Regulae is a crucial work in the corpus of Descartes. Departing from those critics who read it in terms of the Discours, and finding no texts prior to the Regulae that cast light on this difficult work, he proposes that the Regulae carries its own clue as to how it is to be read.