 In several letters toward the end of his life, Arnauld recommends a “little Latin text” on human freedom that he wrote at the time he was wrestling with Malebranche’s theory of nature and grace, saying that it is particularly helpful in connection with the problem of reconciling intrinsically efficacious grace with freedom of  will.[37]  The core of Arnauld’s new theory is that the human soul has freedom of will with respect to a true or apparent good when it has the power to will that good and the power not to will it. In such cases, the soul “determines itself” to will or not will the good in question. The human soul is said to have this power with respect to any particular good it apprehends, as long as the particular good does not encompass all the good toward which the will tends. Arnauld cites I–IIae, 13, 6 as part of the Thomistic origin of his theory: