The narrator grapples with the uncertainty of his choice to withhold the truth from someone important to him. He questions whether his decision was morally correct, pondering the significance of "right" and "fair" in a world where these concepts seem elusive. The struggle lies in the realization that fairness is often a limited idea, seldom applicable to all situations.
This introspection reflects a broader philosophical dilemma: the meaning of actions in a universe that may lack inherent fairness. Despite our desire for fairness to apply universally, reality often contradicts this wish, leading to a profound sense of ambivalence about what constitutes the "right thing" to do.