What metaphors are used in Prentice Alvin by Orson Scott Card?

In Chapter Five, masks, a common metaphor in literature and art, represent the false self that we tend to wear in certain situations, in order to appear to be different than we really are. One of Peggy's biggest problems has always been that she can see people for exactly who and what they are, even if they wear a "mask" for society. In order to keep other people's secrets, she has always had to wear a mask of her own, which keeps her from ever connecting with the people whom she knows so intimately. Now that she has learned not to look past the "masks" of others, she can finally be herself.