The second quatrain strengthens the comparison of the beloved to a summer’s day. The speaker anthropomorphizes the sky, or “heaven,” (5) by using the metaphor of an “eye” (5) for the sun so that the comparison between a person and a season becomes vivid. By assigning heaven an “eye,” the speaker invokes the image of his beloved’s eyes. Similarly, in the next line when the speaker mentions that summer’s “gold complexion” is often “dimmed,” (6) he is attempting to compare another human attribute of his beloved with some trait of summer. The second quatrain presents summer as possessing only mutable beauty.