What is the main conflict in Powers of Horror: An Essay on Abjection by Julia Kristeva?

Kristeva examines the notion of abjection—the repressed and literally unspeakable forces that linger inside a person's psyche—and traces the role the abject has played in the progression of history, especially in religion. She turns to the work of Louis-Ferdinand Celine as an almost ideal example of the cathartic, artistic expression of the abject.