 Arnauld considered it important to be clear about the distinction between philosophy and theology. This concern is present in his work from the beginning, in 1641, to the end of his published writings. Thus, he divides the “Fourth Objections” to Descartes’ Meditations into “the possible philosophical objections regarding the major issues of the nature of our mind and of God” and “the problems which a theologian might come up against in the work as a whole” (Descartes, 2:169). One of Arnauld’s criticisms of Malebranche is that he does not establish many of the principles in his system of nature and grace either by the proper methods of philosophy or of theology. Again, in Règles du bon sens, written the year before his death, Arnauld warns,