In Greek mythology, Prometheus warned Epimetheus against accepting gifts from Zeus. The warning concerns Zeus’s hostility toward humanity after Prometheus took fire and gave it to mortals.
Prometheus and Epimetheus are brothers, and their names create a deliberate contrast. Prometheus is associated with forethought, while Epimetheus is associated with hindsight or afterthought. The warning therefore fits Prometheus’s role as the brother who anticipates danger, even though Epimetheus ultimately accepts Pandora.
This episode is part of the wider Prometheus myth cycle rather than an isolated story about a mysterious container. Zeus sends Pandora as a punishment for the theft of fire, and Epimetheus’s acceptance allows the plan to reach humanity. Prometheus himself does not open the container, create Pandora, or marry her. Those are separate roles in the tradition, and keeping them distinct prevents common mix-ups among the major characters.