Dickinson basically marks the shift of the speaker's tone with the lack of action. Then, she creates an attitude of excitement and building hopes by indicating the speaker's complicated sense of detail and the "italicized great light" which begin in the near future. Further, the speaker's emotions
toward the upcoming event (a death) are very active, involving a jealousy and continued walks in and out of the dying person's "final room". Here, Dickinson gives the reader an image of onlookers particularly facing back and forth through the room waiting for some action to occur. As the tone changes into one of disappointment and realization, the speaker reflects more pedestrian emotions such as being "too jostled to speak". Eventually, the disappointment is naturally connected to the lack of strength surrounding the actual death, with smallest action such as "lightly bending" and "consenting". At the end, the speaker indicates a realization of needing to regulate the abstract understanding of dying, but still, in line with the tone, does not actually do this and instead stays inactive. Dickinson creates a tone shift in the poem largely through the progression of images, which reveal action to those, which reveal the opposite.
She also achieves the tone shift by including different basic patterns and themes. Ironically, in the progression of tone and action, Dickinson maintains the same syllable and rhythm pattern from line to line. This decision sets the stage for the conclusion of the play, in which the speaker realizes the need to find a new understanding of death. The constant rhythm mirrors the realization that death doesn't change, yet people's reactions to it can in that death and the structure are both rather consistent, while the action undertaken by the speaker within the lines can vary (which mimics the speaker's conceptual grasp of dying). Chronologically organizing the poem also serves to help move along the shift in tone by allowing the tone before the death and after the death to be compared as a sequence. Dickinson effectively uses these structure patterns to emphasize the tone shift as it relates to the action in the poem.
In examining death and the human response, Emily Dickinson's poem involves a speaker who experiences an evolution of attitude from an excited anticipation of death to a disappointed realization regarding the true nature of it. She incorporates a progressive lack of action imagery and structural tactics in order to accomplish this.