Despite the apparent differences between the two stanzas, they are linked through the ironic similarity of their evanescent natures. In the first image, the narrator is leaving his lover, indicating a sense of finality (and mortality) to their love. Accordingly, the falling grains of sand in the second stanza recall the image of an hourglass, which in turn represents the passage of time. As the sand flows away until all time has passed, the lovers' time also disappears, and the sand and the romance each turn into impressions from a dream. Through the alliteration in "grains of the golden sand," Poe emphasizes the "golden" or desired nature of both the sand and of love, but he shows clearly that neither is permanently attainable.
Like many of Poe's poems, "A Dream Within a Dream" uses the sea as a setting for a discussion of death and decay. "The City in the Sea" illustrates the imagery of a pitiless sea most clearly, with the Gothic allusions to the end of time, and in "A Dream Within a Dream", the "surf-tormented shore" becomes a second metaphor for time, as the waters of the sea slowly but inexorably pound away at the physical existence of the shore. The narrator regards the wave as "pitiless," but he further associates himself with the temporal nature of the water by