In her novel "Eligible," Curtis Sittenfeld explores themes of love, regret, and the complexities of relationships. The characters navigate the pressures of societal expectations and personal desires, often reflecting on their past choices and the rare opportunities life presents. The story delves into the idea that some moments are fleeting, and grasping them may be essential for happiness.

The quote "I'm old enough to know that sometimes you don't get a second chance" encapsulates this sentiment. It emphasizes the wisdom gained through experience, reminding readers to appreciate the present and seize opportunities as they arise. Sittenfeld's characters embody this struggle, highlighting the importance of making decisions that align with one's true self.