Why a Crystal ball should have le pouvoir de nous montrer/contenir a different reality, le futur or far places/eventi?
Crystal evidentemente nous permet de voir in or through.
La sfera è la forma we give to Earth, pianeti, cosmo; la sfera is the perfect form que la matière liquide assume naturellement (i.e. soap bulles, water drops); la sfera es un microcosmo isolato e delimitato.
We can consider it like a hole à travers duquel we can watch somewhere else (look at suggestivo item 14 di questa lista, ça ressemble à une sphere but it's only a hole...)