Much of The Fall has to do with the human fear of being judged by others, along with the human tendency to judge everyone, including the self. The narrator of this fictional "confession" claims that it is the very process of judgment that we hate – not the end result of punishment. Meanwhile, our protagonist, Jean-Baptiste, derives power from judging others, which he justifies by simultaneously judging himself. Justice, too, is a main focus of the novel. The Fall suggests that true "justice" is elusive, if it even exists at all, in a world where all are guilty and hypocritical.
In The Fall, the narrator is conversing with himself. This explains why his judgment functions simultaneously a confession.