Chapter 3 argues that Thomas radically reconfigures the relation between original sin and human nature. Whereas Augustine had argued that nature is “corrupted” by the Fall, Thomas draws on Denys the Areopagite to argue that strictly speaking, human nature survives the Fall. For Thomas, there are two senses of the word “nature.” In the strict sense, “nature” refers to the principia naturae and the propria that follow therefrom. The secondary sense of “nature” refers to what is good for nature – including communion with God. Thomas regularly uses Augustinian language concerning the corruption of nature by sin (e.g., STh I–II, q. 109), but when he explains this usage he indicates that it is improper (e.g., De malo q. 5, a. 2). Nature is “corrupted” only insofar as human beings have lost the good of nature, original justice. The principles and properties of human nature – including the orientation to God – remain. This is why Thomas argues that children who die unbaptized will know and love God in limbo.