What metaphors are used in Matched by Ally Condie?

The Compass Needle (Metaphor). Cassia compares herself to the needle of Ky’s compass, feeling lost. As of Chapter 16, when this metaphor occurs, she has many unanswered questions and conflicting emotions regarding Ky. Though she doesn’t know exactly what his artifact does, she knows that it can at a certain point decide on a direction to go in; she, to her own dismay, cannot seem do the same.