In Curtis Sittenfeld's book "Prep," the protagonist reflects on human relationships, noting how individuals can sometimes treat others poorly, only to later become more considerate of different people. This acknowledgment of past mistakes suggests a growth in understanding and empathy that emerges from experience.

Moreover, the narrator expresses gratitude for these difficult relationships, considering them valuable lessons that contribute to personal development. The idea that one's challenging interactions can serve as practice for future relationships implies a cycle of learning that benefits different people throughout one's life.