In Robert Frost's poem "Dust of Snow," he presents nature as a spiritually healing environment filled with animals and other elements of the setting that can provide an immensely positive change in an individual's moods and responses to life. The "dust of snow" refers to the fine crystalline particles that fall on the speaker's body due to the subtle movements of a crow sitting on a hemlock tree. The reader can assume that before this moment the speaker was in a negative state of mind. The intensity of his emotions have caused him misery and persuaded him that the rest of the day will continue to as be as downcast as the first portion of his day. However, the simple act of falling snow hitting his body causes an instantaneous and wonderfully transformative outlook on his mood and his overall emotional state. His previous feelings of assurance that the day will hold only sadness suddenly change his mindset to a more hopeful one, one that gives him a belief that the rest of the day may turn out to be much happier and may hold better things for him than its negative beginnings. The end of the poem shows the speaker's mood has changed from sullen and hopeless to optimistic and hopeful.