To provide a more accurate response, I would need additional context about the specific flashback and narrator you're referring to. However, in general, flashbacks in literature often serve to reveal important aspects of a character's background, motivations, or emotional state. They can provide insight into the narrator's past experiences, relationships, and the events that shaped their current perspective.
For instance, a flashback might showcase a pivotal moment in the narrator's life that influences their current behavior, beliefs, or decisions. It can reveal vulnerabilities, traumas, or significant relationships that define the character's identity.
If you can provide more detail about the specific work or context, I would be happy to offer a more tailored analysis!