Abstract

L’usage de la raison et de la foy ou l’accord de la foy et de la raison (1704) by Pierre-Sylvain Régis can be considered his last attempt to defend the ‘new philosophy’ of René Descartes by vindicating its agreement with faith and protecting it from censorship. This contribution offers an analysis of the theories expounded by Régis in this treatise, showing how these evolved from those of his earlier Système de philosophie (1690), and arguing that both are characterized by a reinterpretation of the Cartesian metaphysics on an empirical basis. In particular, Régis offered an empirical interpretation of the relations between substances, attributes and modes, by which he criticized Spinoza’s metaphysics and attempted to solve the riddle of Descartes’ dualism.