In "The Blind Assassin," Margaret Atwood explores themes of isolation and the search for identity through the metaphor of a letter. The protagonist expresses a growing sense of disconnection, feeling like a letter that is dropped off in one place only to be collected elsewhere, yet ultimately remaining unaddressed. This sentiment reflects a profound sense of purposelessness and the struggle to be understood in a world that often overlooks individual experiences.

The imagery of being a letter without an address highlights the emotional turmoil faced by the character, illustrating feelings of being lost and unanchored. Atwood uses this metaphor to comment on the human experience of longing for connection and recognition while grappling with the realities of solitude and existential uncertainty.