Cal Trask is the most obvious figure for the Biblical Cain in the novel: his father Adam loves his twin brother Aron best. Though his father hides Catherine’s identity from the boys, Cal eventually figures it out, and worries that her evil is reproduced in him. Over the course of the novel Cal struggles to learn that his fate—his decisions, his virtue, his goodness—is in his own hands. He succumbs to his more base impulses and reveals his mother’s identity to his brother. Aron (as Cal knew he would be) is distraught. Aron subsequently joins the army and is killed. At the same time, Cal falls in love with Abra, the girl Aron planned to marry, and she falls in love with Cal, believing her relationship with the “purely good” Aron is not at real as the one she shares with Cal. Cal is thus responsible for his brother’s death—but at the end of the novel, it is suggested that he is not beyond redemption. His father forgives him and blesses his marriage to Abra, and Cal knows he can choose to be good going forward.