When John first hears the voice behind him, he turns and sees the seven golden lampstands with Jesus standing in their midst, dressed in a robe with a golden sash. His hair was as white as white wool, his eyes were like a blazing fire, and his feet were like bronze polished in a furnace. His voice was like the “sound of many waters” (ἡ φωνὴ αὐτοῦ ὡς φωνὴ ὑδάτων πολλῶν). What are "many waters?