In the novel "Wedding Night" by Sophie Kinsella, the theme of overcoming negative emotions is encapsulated in the quote: "But even bitterness fades away eventually." This reflects the idea that despite the pain and resentment that can arise from difficult situations, these feelings are not permanent. The characters are called to maintain hope and believe in the possibility of healing and moving forward.

This notion suggests that both the individuals involved in conflicts and the readers must embrace the concept of resilience. By recognizing that bitterness can diminish over time, the characters and the audience are encouraged to let go of past grievances and remain open to new beginnings. Ultimately, the story promotes optimism and the belief that love can triumph over negativity.