In Cecelia Ahern's book "Where Rainbows End," a central theme revolves around love and the importance of marrying for genuine affection rather than obligation. The character Rosie expresses a powerful sentiment about the sanctity of love, stating that entering a marriage without love is inherently wrong. This perspective challenges traditional views that prioritize practicality over emotional connection in relationships.

Rosie’s conviction highlights the significance of choosing a partner based on true feelings rather than societal pressures. It emphasizes the idea that love should be the foundation of any romantic commitment, suggesting that true happiness in marriage can only be found when love is at the core of the relationship.