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
Komi mythology family. The land of the dead was usually thought to be far to the north of the living, beyond mountains, rivers and forests. The Komi equivalent of the Styx (the river of the underworld in Greek mythology) was "Syr Yu" (Сыр Ю), "River of Pitch". Dead souls were assigned various means of crossing the river, according to their sins in this world: an iron bridge, a shaky beam, a thin pole or a cobweb. After this the dead had to climb a huge slippery mountain. This was only possible if the person had led a good life and had strong