Talmud sobre Guittin 6:8

HALAKHAH: “One testifies by the light of a candle.” ¹²²This paragraph is copied from Giṭṭin 6:6. Rebbi Ḥanina said, Rebbi Jonathan taught me, only if they saw a man’s shadow. Rebbi Aḥa in the name of Rebbi Ḥanina: There¹²³Mishnah Giṭṭin 6:6., we have stated: “If somebody had been thrown into a cistern and said, anybody who hears my voice should write a bill of divorce to my wife, they should write and deliver,” and Rebbi Jonathan said, only if the saw a man’s shadow. Rebbi Aḥa bar Ḥanina, in the name of Rebbi Ḥanina: That means, in the fields, but in town even without a man’s shadow. But did we not state: “If somebody had been thrown into a cistern and said, anybody who hears my voice should write a bill of divorce to my wife, they should write and deliver,” and Rebbi Jonathan said, only if they saw a man’s shadow? Rebbi Abun said, damaging spirits¹²⁴In the opinion of the Babli, Giṭṭin 66a, they can take on human shapes and even have a shadow. But since that shadow is the work of the spirit and not of physics, they have no half shadows (meaning that the shadows of spirits follow the rules of geometric, not of wave, optics.) are as frequent in cisterns as they are frequent on the fields.