Here is a summary:
The piece is a brief, evocative description of a sudden, intense feeling of grief that arises from the dream world and lingers even after waking. Frost uses vivid imagery and a stark, almost poetic style to convey the feeling of a dream pang.
The piece evokes:
* The fragility of memory: The speaker describes the dream pang as "evanescent," suggesting the ephemeral nature of dreams and the difficulty of holding onto their emotional impact.
* The power of the unconscious: The dream pang, arising from the unconscious mind, highlights the profound influence of our dreams on our waking lives.
* The bittersweet nature of loss: While the dream pang is a feeling of grief, it is also a reminder of the beauty and love that were lost.
The piece ultimately leaves the reader with a sense of both sadness and wonder, suggesting that the dream pang is a reminder of the power of our dreams and the enduring nature of our emotions.