Abstract
Just as he puts to the test, in his private correspondence, the philosophical theses that he will then defend in more elaborate treatises, Fenelon has thus put to the test, in his letters, polemic anti-Jansenist arguments that he has then developed in his Pastoral Instruction in the form of dialogues subscribed on January 1, 1714 to defend the doctrinal legitimacy of the condemnation of Quesnel’s errors by the Bull Vnigenitus. In the years before the publication of the Clementine Constitution, Fénelon’s correspondence developed an obsession with the necessity of condemning Jansenism by the Roman proscription of the system of the two delectations.