When the narrator of "Stopping by Wood on a Snowy Evening" pauses on a dark, snowy night to watch the snow fall in the woods, his horse, accustomed to stopping in the town, is confused. "He gives his harness bells a shake/ To ask if there is some mistake." The horse is used to being driven from farmhouse to farmhouse, and he doesn't understand the reason the narrator stops in the dark woods to contemplate nature. The bells are the call back to the town and to human society. As the narrator pauses in the woods, "The only other sound’s the sweep/ Of easy wind and downy flake." In other words, all the narrator can hear is the wind in the woods. The wind is the call to stay in nature that is in opposition to the pull the narrator feels to go back to town.