In the poem "Dust of Snow" by Robert Frost, the poet encounters a simple moment in nature that unexpectedly changes his mood. The poet initially feels burdened and despondent, as symbolized by the "wayward" crow and the "hemlock tree" which are traditionally associated with gloom and despair. However, when a "crow" shakes off a "dust of snow" from a hemlock tree, causing it to fall onto the poet, it unexpectedly lifts his spirits. The "dust of snow" serves as a metaphor for a small, unexpected moment of joy or clarity that disrupts the poet's negative mood and brings about a positive change.
Therefore, the poet seems to appreciate the transformative power of nature and the significance of small moments in life. Despite the initial gloominess associated with the crow and the hemlock tree, the poet finds solace and rejuvenation in the simple act of the snow falling on him, suggesting a shift from despair to hope or renewal.