The quote "Seeming and being are not one and the same" emphasizes the distinction between appearance and reality. It suggests that what may appear outwardly might not reflect the true essence of a person or situation. This theme resonates throughout Cecelia Ahern's book, "P.S. I Love You," where characters navigate their identities and relationships, often uncovering deeper truths beneath surface perceptions.

This idea challenges readers to look beyond superficial judgments and understand the complexity of human experiences. Ahern's narrative encourages introspection, urging one to reflect on the contrasts between how things appear and their underlying realities, ultimately advocating for authenticity in connections.