In his sonnet "Design," Frost describes the fatal convergence of a white moth, a white flower, and a white spider. The image is stunning, combining death, life and beauty in a carefully observed moment. It wraps them in a single hue, and leads the poem's speaker to wonder whether there is some sort of divine design in this tableau. The economy of the poem is striking and potent, as the form limits Frost to fourteen lines and a regular rhyme scheme. He further limits himself to a single color in his use of imagery.
"Tree at my Window" speaks of the intimate relationship between the poem's speaker and nature. He considers himself an equal with the tree outside his window. Both beings are subject to forces outside themselves. The tree is tossed about by the wind, paralleling the speaker being buffeted by life's pressures, though his struggles are internal. The tree and the man can only observe each others' struggles and commune wordlessly, the speaker believes. The man is sure that whatever made the tree made himself, too, as a complement. The willingness of the speaker to recognize the tree's challenges and invite it to share life's "weather" with him reflects humanity's desire to commune and commiserate with other beings in the natural world.