In the poem "Because I could not stop for Death—," the speaker, who has recently died, describes the moment when Death came for her and, in a horse-drawn carriage, escorted her to the afterlife. The poet uses imagery to describe the speaker's journey from life to the afterlife.
For example, on her way to the afterlife, the speaker and Death passed "the School, where children strove / At recess." They also passed "Fields of Gazing Grain" and "the Setting Sun." These images altogether connote a peaceful, almost idyllic atmosphere, echoing the ease and peacefulness of the speaker's journey to the afterlife. These three images also possibly represent the three stages of the speaker's life. The children represent her own childhood, the "Fields of Grazing Grain" represent her maturity, and the "Setting Sun" represents her death. The "Setting Sun" evokes an image of light giving way to darkness and is thus an appropriate image to represent the speaker's passing from life to death.
In the fourth stanza, the poet uses images like "The Dews drew quivering and chill" and "only Gossamer, my gown." The "Dews" refers to the clothes that the speaker was wearing. The coldness evoked by the phrase "quivering and chill" suggests that she was, at this moment, drawing closer to the coldness of death. When the speaker compares her gown to "Gossamer," the implication is that her gown felt light and that she was perhaps floating away from life and into the afterlife. This impression of lightness emphasizes the idea that the speaker was, at this moment, drawing closer to death.
In the final stanza, the speaker says that it has been "Centuries" since she died and since she first saw the horses that pulled the carriage in which she took her final journey. She says that those "Horses' Heads / Were toward Eternity." Horses often connote nobility, beauty, and grace, and so this image perhaps implies that the speaker's death was also noble, beautiful, and graceful. The idea that the horses took the speaker towards and into "Eternity" suggests that death is not the end, but merely a period of transition from one form of existence to another.