VI. The life or Double was called, _Ka_, plur. _Kau_. This was
the vital principle, necessary to the existence of man as an
animal being on this earth. It was a spiritual double, a second
perfect exemplar or copy, of his flesh, blood, etc., body; but
of a matter less dense than corporeal matter, but having all its
shape and features, being child, man, or woman, as the living
had been. It dwelt with the mummy in the tomb and had a
semi-material form and substance, and I am inclined to think,
from the texts, it had power to leave the tomb when it pleased
but always returned. Its emblem was the _ankh_ or _crux ansata_.
It was something like the higher _Nephesh_ of the Hebrew
Qabbalah. The sacrificial food left in the tombs and the
pictures on their walls were for the benefit of the _Ka_. The
_Ka_ corresponded to the Latin, _genius_. Its original meaning
may have been _image_;[107] it was like the Greek _eidolon_,
i.e., ghost. The funeral oblations were made to the image or
_Ka_. The _Ka_ was a spiritual double of the man, a kind of
prototype in the Upper World, of the man in the Lower World, our
earth.[108]

VII. The Mummy or the Husk was called, _Sahu_. It was the body
after embalmment. "His body is in the condition of being true;
it will not perish."[109] The _Sahu_ was considered a true being
as it was assumed that it would always remain the same. It was
like the lower form of the _Nephesh_ of the Hebrew Qabbalah. The
atoms of the mummy-body were still intact held together by the
_cohesion_ of the particles. This cohesion was looked upon as a
spiritual energy keeping the particles together, in the form of
the mummy. The word _Sahu_ may sometimes refer to this living
personality.

VIII. The Heart was called _Ab_. This was thought to be the seat
of life, the life being in the blood, and the embryonic life
starting with the pulsations of the heart. See, Appendix A.

The _Ba_, performed the journey through the Underworld accompanied by
the Name and Shadow, until it reached the Hall of Judgment; if
pronounced pure, the Heart was then given it. The Name, Shadow and
Heart, then awaited reunion with the _Khu_ and _Ka_ for the condition
of final immortality and the power to make the transformations. The
body was embalmed and the _Ka_ dwelt in the sepulchre with it, but
went in and out of the tom