In "The Witches of Eastwick," John Updike explores the universal nature of dreams and the human experience of confronting mortality. The quote reflects the shared journey we all undertake as we face the inevitable reality of death. It implies that both dreaming and the contemplation of death are integral parts of life, guiding us as we navigate our existence.

This metaphorical passage suggests that the "caves of our deaths" represent the unknown aspects of life that we fear yet must confront. The act of standing aghast indicates a sense of awe and dread, emphasizing that while dreams inspire hope, the reality of death is a profound encounter that shapes our understanding of life itself.