Though the speaker admits to being “nobody,” there is a tone of cheerfulness, as the exclamation point underscores. While the poem's theme—the pointless pursuit of renown—is serious, Dickinson relates the theme through an ironic tone that combines lightness with self-negation.
While the priceless jewel was on display; the museum increased security, decided to extend the hours so more people could see it and rearranged exhibits.