Geometry in art contributes to the peice’s shape and form. Geometry can be a key part of an artist’s style and create interesting visual elements. However, if the shapes and forms are used in a way that may disrupt the visual path of an art peice or obstruct the space, the whole image could become off kilter.
In "Of Mice and Men", the theme of loneliness is present when Lennie is isolated from the other men, like in chapter 4, when A. Crooks tells Lennie he can't come into his room.