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
Book of the Dead regarded as the aspect of being which included intelligence and memory, was also protected with spells, and in case anything happened to the physical heart, it was common to bury jewelled heart scarabs with a body to provide a replacement. The "ka", or life-force, remained in the tomb with the dead body, and required sustenance from offerings of food, water and incense. In case priests or relatives failed to provide these offerings, Spell 105 ensured the "ka" was satisfied. The name of the dead person, which constituted their individuality and was required for their continued existence, was written in many