In Greek mythology, Epimetheus ignored Prometheus’s warning when he accepted Pandora. Prometheus had cautioned his brother not to receive gifts from Zeus, but Epimetheus accepted her anyway.
The episode creates the myth’s central contrast between the brothers. Prometheus is portrayed as foresighted and suspicious of Zeus, especially after stealing fire for humanity. Epimetheus, whose name suggests afterthought, fails to apply that caution before the consequences arrive.
This warning is distinct from the later act of opening the vessel. In Hesiod’s narrative, Pandora comes to Epimetheus and he takes her despite Prometheus’s advice; the vessel is then opened in the household. Many short retellings compress these events, but separating the warning from the opening helps identify the roles of both brothers accurately.