The portrayal of the nobleman as the spider and the peasant as the fly is a symbolic depiction of the oppression and exploitation that the peasants faced at the hands of noblemen. Just as a spider catches and consumes flies, the nobleman are depicted as exploiting the peasant for his own gain. This portrayal serves as a critique of the aristocracy's treatment of the lower classes, highlighting the inequality and injustice inherent in the feudal or hierarchical societal structure.