The quote from C.S. Lewis's "Till We Have Faces" emphasizes the idea of unity and belonging in the world. It suggests that a person cannot truly feel like an exile or an outsider if they recognize that everyone shares a common human experience. This perspective fosters a sense of connection with others, irrespective of physical distance or circumstances. It highlights the importance of memory and collective humanity in overcoming feelings of isolation.

By contemplating that "all the world is one city," Lewis encourages individuals to appreciate their connections with people everywhere. This realization can lead to a deeper understanding of oneself and others, promoting empathy and solidarity. Ultimately, it serves as a reminder that despite our differences, we are all part of a larger community, and maintaining this awareness can mitigate feelings of exile and loneliness.