Instead of seeing death as an end to life, the ancient Egyptians saw it as the beginning of a dangerous journey (Wikipedia 3). That is why they had texts such as The Book of the Dead (known to ancient Egyptians as The Book of Coming Forth by Day) to guide the dying with magical formulae intended to justify a person's deeds (negative confessions) and teach them how to avoid complications during this important voyage.
In order to reach the realm of the gods, the Egyptians believed a person must first travel through the Underworld, where their heart is weighed on a scale by Anubis (son of Osiris and Nepthys) and Thoth (Kinnaer 2). All of a person's good and bad deeds would be considered. If a person had committed an excess amount of bad deeds, a monster known as "Eater of the Dead," or Ammit, with the head of a crocodile, would eat the hearts weighed down with sin.
The ancient Egyptian's concept of Duat was that it was beset with all sorts of carnivorous animals and evils that only a well-instructed individual could master through spells which would prevent him or her from suffering things such things as walking upside down or eating excrement (Shand 1-5). The word Tuat literally means "Other World" and it was believed to be a realm of darkness, filled with lakes of fire. It would be easy for a person to be discouraged here and only through masterful and honest preparation would one avoid death of the Ka and Ba and subsequent reincarnation on earth. In this manner people would be tested and worthy devotees proved themselves lovers of Ra.
Kinnaer, Jacques. "Anubis: Gods and Religion in Ancient Egypt." 2004. http://www.ancient-egypt.org/glossary/religion/anubis.html
Shand, Richard. "The Nightmarish Underworld: The Pyramid Texts." Mystae.com. 2004. http://www.mystae.com/restricted/streams/scripts/duat.html
Blavatsky, H. P. and William Judge. "Ancient Landmarks XX: Egyptian 'Immortality.'" THEOSOPHY Vol. 15, No. 11, September 1927. "Wisdom World." http://www.wisdomworld.org/additional/ancientlandmarks/EgyptianImmortality.html
Wikipedia: The Free Encyclopedia. "Egyptian mythology" and "Egyptian soul." 2004. http://en.wikipedia.org/wiki/Egyptian_mythology http://en.wikipedia.org/wiki/Egyptian_soul