Ba

The Book of the Dead is a modern title for a collection the Egyptians themselves called the Book of Going Forth by Day, and the going forth in question belongs to the ba, the mobile aspect of the self depicted as a bird with a human face, usually the deceased's own. Confined to the tomb by night, reunited each evening with the mummified body it belongs to, the ba was believed capable of leaving by day, through the tomb's false door or its shaft, to visit the sunlight, receive offerings left at the tomb chapel, and move freely through places the person had known in life.

A substantial fraction of the Book of the Dead's spells exist to secure and protect this mobility: spells for taking the form of various birds and other creatures, for opening the tomb, for not being trapped or turned back, for having power over water and air. The anxiety these spells address is a real one within the system's own logic, a ba that could not leave, or that could leave but not safely return, faced a kind of second death, the very outcome the whole apparatus of Egyptian funerary religion existed to prevent.

The ba's freedom of movement did not mean the deceased ceased to depend on the tomb and its offerings; the ba required food as much as the ka did, and needed a functioning, identifiable body to return to each night, which is one of the central reasons Egyptian burial practice invested so heavily in preserving the corpse through mummification and providing statues as a backup vessel should the mummy itself be lost or destroyed.

Ka and ba are easily confused by a reader meeting Egyptian religion for the first time, since both are commonly translated with the vague English word "soul," but the ancient system distinguishes them by function rather than treating them as synonyms or as two names for one thing. The ka is created at birth, is closely bound to the physical body and its sustenance, and is generally described as staying at or near the tomb, waiting to receive its offerings. The ba is specifically the part credited with personality, individuality and, crucially, mobility, the aspect able to travel and to represent the deceased's continuing agency in the world.

The two are not rivals for the title of "the real soul"; Egyptian religion treats a person as composed of multiple genuinely distinct elements, ka, ba, akh, the shadow and the name among them, each contributing a different capacity, and personhood as a whole depending on all of them functioning together, in life and, through ritual, after death as well. Losing any one of them, in the logic of the funerary texts, was a real danger, not a philosophical nicety.

What ties ka and ba together most directly is the akh, the transfigured, effective spirit that Egyptian belief holds results from their successful reunion, achieved through the correct performance of funerary ritual, the recitation of the right spells, and the preservation of the body as an intact, identifiable anchor. A ba that could not find its ka, or a ka left with no ba to reunite with, was understood to leave the deceased incomplete, unable to become an akh and share in the afterlife the whole funerary system was built to secure.