 In "Gylfaginning" by Snorri Sturluson, Gylfi, the old king of Scandinavia, receives an education in Norse mythology from Odin himself in the guise of three men.Gylfi learns from Odin (as "Þriði") that Odin gave the first man his spirit, and that the spirits of just men will live forever in Gimlé, whereas those of evil men will live forever in Niflhel