Keats describes change as an ongoing process independent of human interaction and perception, where Wilbur shows changes brought about by specific human interaction and which require a change in perception is inherently noticeable. Both poems use metaphors to enhance the descriptions of their changes, although Keats uses a metaphor from poetry to describe the changes, while Wilbur uses the changes as a metaphor to describe a speaker's love for a beloved . The tone of both poems is used to show that a change has occurred, but while Keats presents a repeating tonal pattern to show the continuing cycle of changes, Wilbur presents a single change in tone that corresponds to the change within the nature. Polarizing images from two very different contexts are used in both poems to show that a change has occurred, but the methods by which the changes are observed are very different. Through this comparison of the two poetic works, we show that observable changes within nature can occur, whether independent of human interaction or caused by a change in human perspective.