The quote reflects the transformation of the protagonist into a troubled individual shaped by his experiences. The imagery of wandering through wreckage with blood streaming symbolizes emotional and physical trauma. He grapples with a sense of confusion regarding the world around him, highlighting his feelings of helplessness and alienation.
As the narrative unfolds, it reveals how these struggles have led him to become indifferent and incapable of forming meaningful connections, whether it be saving a friend or loving someone. This emotional distance illustrates the profound impact that damage and loss can have on one's ability to engage with others and find purpose.