What metaphors are used in The Country Without a Post Office by Agha Shahid Ali?

By using lines from one of Hopkins's sonnets as an epigraph, Ali foreshadows that the speaker's relationship to himself in the poem is a metaphor for his relationship to his country. Like Hopkins, Ali uses the image of the heart and the metaphor of "dead letters" to describe the idea of being lost and the pain of being a stranger to one's emotional life.