In the expression “Pandora’s box,” what does the box symbolize when opened?

In the expression “Pandora’s box,” the opened box symbolizes the release of troubles. The phrase comes from the Greek myth in which Pandora opens a container and evils or afflictions escape into the human world.

The earliest surviving literary account, Hesiod’s Works and Days, describes a pithos rather than a small box. A pithos was a large storage jar used in the ancient Greek world. The “box” wording became familiar through later translation and retelling.

The modern idiom is used for an action that creates many unexpected problems or releases consequences that are difficult to contain. It does not usually refer literally to a container, and it is often applied to technology, politics, science, or personal decisions.

In Hesiod’s story, hope remains associated with the vessel after the troubles escape. That detail is interpreted in different ways, but the established symbolic meaning of opening the box is the release of troubles into the world.