Poured to Be Shared, Poured to Be Given Away Entirely

Greek religious thought drew a sharp practical line between the Olympian gods above and the chthonic powers below, the dead and the gods of the underworld, and the sponde marked that line by how it was performed. A libation to an Olympian god was typically poured after the human participants had themselves tasted or drunk from the same vessel, since the god and the worshippers were understood to share a substance in the act, and the libation vessel might be only partly emptied onto the altar. A libation to the dead or to a chthonic power was, by contrast, poured out completely, often into a pit dug in the earth or directly onto a grave, with no portion reserved for the living, since the offering was meant to travel entirely downward rather than to be a shared meal between mortal and immortal.

Funerary libations at tomb monuments and the annual Athenian festival of the Anthesteria, which combined wine drinking with rites explicitly addressed to the restless dead, both draw on this same distinction, one of the clearest cases where the mechanics of a single ritual act encode a whole cosmological division in Greek religious thought. Vase painting frequently distinguishes the two gestures visually, an upright phiale held toward an altar for an Olympian libation against a vessel tipped fully downward toward the earth for a chthonic one, letting modern scholars read intended recipient directly off the imagery.