The underworld in Egyptian mythology, known as Duat, is significant as it represents the afterlife destination for souls. It is a complex realm governed by the gods Osiris and Anubis, where the deceased undergoes judgment. The heart is weighed against the feather of Ma'at, symbolizing truth and justice, determining one's fate in the afterlife. Duat is not merely a place of punishment; it also contains elements of rebirth and transformation, offering hope for everlasting life. This belief reflects ancient Egyptian values of order, morality, and the importance of the preservation of the soul.