A poem that warms winter's cold

Though this poem by Robert Frost describes a winter scene, it has a warming affect on me whenever I read it. Frost injects humor into the poem when he describes his horse's reaction to his stopping to watch the snow fall. I particularly liked these two lines: "He gives his harness bells a shake | To ask if there is some mistake." In doing that, he humanizes the horse. Animals have more intelligence than many people realize. Their intelligence is often discounted because it is different from ours.

I'm unsure why Frost repeats the same line twice in the last stanza. Is it Frost's attempt to indicate that he has many more miles miles to travel before he reaches his destination? Sometimes, however, I find the repetition in the final couplet distracting.

Stopping by Woods on a Snowy Evening

By Robert Frost

Whose woods these are I think I know.
His house is in the village though;
He will not see me stopping here
To watch his woods fill up with snow.

My little horse must think it queer
To stop without a farmhouse near
Between the woods and frozen lake
The darkest evening of the year.

He gives his harness bells a shake
To ask if there is some mistake.
The only other sound’s the sweep
Of easy wind and downy flake.

The woods are lovely, dark and deep.
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep.