* Personification: "O day" directly addresses the day as if it were a person. This gives the day agency and allows the speaker to express their feelings to it.
* Metaphor: "Silver mists" could be a metaphor for several things:
* The morning fog: This is a common interpretation, suggesting the speaker is mourning the loss of the cool, quiet morning, which has been replaced by the brightness of day.
* The uncertainty of the future: The "mists" could symbolize the unknown that lies ahead, perhaps related to grief or other anxieties.
* Alliteration: The repetition of the "m" sound in "mine eyes" and "silver mists" creates a sense of smoothness and flow, adding to the lyrical quality of the line.
* Enjambment: The lack of punctuation at the end of the line creates a sense of anticipation and invites the reader to continue reading to discover the full meaning of the speaker's question.
To fully understand the techniques Dickinson uses, we'd need more context. What precedes and follows this excerpt? The poem's overall theme and tone would give us a better understanding of the metaphorical meanings of "silver mists" and the speaker's feelings.
Let me know if you have the full poem, and I'd be happy to provide a more detailed analysis!