The Egyptian believed in an after life that they would go to when they died. The Book of the Dead was very important for it had spells in them for the dead. When they did die, they would be mummified and then they would take the persons heart and weigh it to a feather. If the heart was liter than the feather then they would live happily in the after life. But if it weighed more then the feather the god Ammut would come and eat it up. The underworld was guard by the god Osiris.