In this quote from "Antony and Cleopatra," the speaker reflects on the end of a promising time, symbolizing the transition from light to darkness. This illustrates the overarching themes of loss and hopelessness that permeate the play, as characters confront their imminent fates and the consequences of their choices. The bright day serves as a metaphor for optimism and vitality, now overshadowed by the approach of despair and uncertainty.

The sentiment expressed captures the essence of the play’s climax, where love, ambition, and tragedy intertwine. As the characters face their demise, the reference to the "bright day" and "Dark" signifies the inevitable downfall that befalls both Antony and Cleopatra. This moment encapsulates the tragic conclusion of their tumultuous journey, emphasizing the duality of their experiences as they shift from moments of glory to the shadow of death.