Mary,in contrast,is distinguished by her giving nature and her concentration on the workings of human emotion.In caring for Silas,Mary sees not his lack of ability or this laziness but the face that he is "worn out" and needs help.To Mary,home represents not obligation ("they have to take you in")but unconditional love:"I should have called it/Something you somehow haven't to deserve."Mary is observant,not only of outer appearances but also of the inner person;this is why she thinks not that Silas is trying to trick them but that he is a desperate man trying to salvage a little self-respect.