The phrase "Hate the sin, not the sinner" reflects a common belief held by many that individuals should be judged based on their actions rather than their character. This raises questions about morality and the extent to which one can separate a person from their wrongdoings. In Katie McGarry's "Chasing Impossible," these themes are explored as the narrative examines complex relationships and the internal struggles of the characters.

As the story unfolds, readers are prompted to consider the balance between acknowledging faults while still showing compassion for the individual committing them. This conflict is central to the characters' journeys, pushing them to confront their own beliefs about sin, forgiveness, and redemption in a nuanced way.