|Pandora's box is connected with the myth of Pandora in Hesiod's 'Works and Days'. The container in the original story was a large storage jar but the word was later mistranslated as "box". |
When Prometheus stole fire from heaven, Zeus took vengeance by presenting Pandora to Prometheus' brother Epimetheus. Pandora opened a jar left in his care containing sickness, death and other evils which were released into the world.
|Though Pandora tried to close the jar, only one thing was left behind – usually translated as Hope.|
From this story has grown the idiom "to open a Pandora's box", meaning to do some small act that will cause great and unforeseen harm.