Well, they really exhibit the myriad and complicated potential of the human heart. As Faulkner says in his Nobel Prize speech, "man will not merely endure, he will prevail." While the Bundrens may appear to be merely uneducated country folk, they reveal themselves to be so much more. Dewey Dell, although she can not forgive Darl, learns to love and accept her family (perhaps she could even grieve for Addie in the process)-- she takes care of Cash and watches out for Jewel and Vardaman. Cash becomes our voice of reason. He sees the family for what they are and learns to love them any way. (Isn't that prevailing?) And Jewel, for all his pride, becomes a hero simply because he does not know he is. Vardaman, the youngest and most pure, some how manages to preserve his ability to love, feel, and see the world for what it is...("Crazy is further than Jackson...") and this ability allows him to provide the glimmer of hope that this novel promises: we will prevail because of our ability to love.