Sometimes we see injustice in the ugly way we treat each other as human beings, like in an outsider who is shunned by social divisions, and only requires what all people do - love and acceptance. Sometimes injustice is what one sees in a misguided community's visceral reaction to a cultural event or tragedy. While Cecily's undeniable empathy brings her to the side of the former (she almost went to jail for trying help a Hispanic couple avoid it themselves), it is for her communities that her voice is loudest and her defense is strongest. It is there where she had her awakening.
Prose and Thorn 