The Forbidden Fountain of Oz food, which occurs most famously in the "forbidden fruit" of the Tree of Knowledge of Good and Evil in the Book of Genesis, but in other contexts too. The idea of water that purges the drinker's memory is also ancient. In Greek mythology it occurs as the river Lethe: the souls of the dead lose their memories of their earthly lives by drinking its water. The same idea can also be found in Eastern and other literatures, as in the "Well of the Waters of Forgetfulness" and other guises. "The 'Drink of Forgetfulness' is found in Greek, Hindu, Norse, and
Barge of the Dead travel to Gre'thor on a barge steered by a ferryman". Religious studies scholars Ross Kraemer, William Cassidy, and Susan L Schwartz interpreted the representation of Gre'thor and Klingon spirituality as borrowing from Norse and Greek mythology, specifically the crossing of the rainbow bridge Bifröst or the river Styx. Exploring the influence of the Greek story of Odysseus (Latin: Ulysses) on "Star Trek: Voyager", the Classical philologist Otta Wenskus points to Siren-like creatures who call out with the voices of those loved by those on the barge. Though the motif of a barge and ferryman is not present in Homer's portrayal