How does Tomas Transtromer use imagery in Answers to Letters?

Tranströmer frequently uses the comparative devices of metaphor and simile for imagery both of which are figures of speech that suggest a similarity between two objects or actions (although a simile is characterized by the use of the words "as" or "like"). As many critics have suggested, Tranströmer's metaphors and similes do not merely serve as descriptive tools; they are often used to transform the reader's experience of reality. They involve rapid shifts to ideas that may seem unrelated to the "tenor," or the original source of the comparison.