Here, Curie suggests to Citra that having a guilty conscience is what will make her a good scythe—she'll never be numb to killing and will remember every person she gleans. It's also telling that Citra trusted the Thunderhead so completely and didn't realize that it could simply choose to not punish her. While this may also be the result of a guilty conscience, it suggests that Citra believed the Thunderhead was unshakably good, like she believed the Scythedom was.