In this chapter, we learn that the "soul of iron" is the source of the evil that is about to befall the "Seven Kins of Purgatory" . In other words, the "Soul of Iron" is a symbol of evil. It is a reminder that evil is not limited to one person or one group of people, but that evil exists in all people and all places. The soul of iron also reminds us that there are people in the world who like to be alone, but not all people can handle the isolation that comes with being alone. This is because not all of the world's people like being alone, and not even one person can handle isolation. This reminds us once again of the power of the soul, and we are reminded once again that evil does not exist in all men and women, but only in those who are willing to sacrifice themselves for the greater good.