Now the most remarkable feature of this entire development is the fact that the idea of the corporeal soul in no wise disappears, as one might suppose, with the origin of the breath or shadow soul. On the contrary, both continue to exist without any mutual interference. This is noticeable particularly in the case of death in war. The belief that the soul leaves the body with the blood may here be directly combined with the belief that it departs with the breath, though the two ideas fall under entirely different categories. Even in Homer this combination of ideas is still clearly in evidence. The breath soul is said to descend to Hades, there to continue its unconscious existence as a dreamlike shadow, while at the same time the corporeal soul is thought to inhere not only in the blood but also in other parts of the body. Certain particular organs of the body are held to be vehicles of the soul; among these are the heart, the respiratory organs, and the diaphragm, the latter probably in connection with the immediately adjacent kidneys, which these primitive soul ideas usually represent as an important centre of soul powers. The believer in animism was not in the least aware of any contradiction in holding, as he did for a long time, that these two forms, the corporeal soul and the breath soul, exist side by side. His concern was not with concepts that might be scientifically examined in such a way as to effect a reconciliation of the separate ideas or a resolution of their contradictions. Even the ancient Egyptians, with their high civilization, preserved a firm belief in a corporeal soul, and upon this belief they based their entire practice of preserving bodies by means of embalmment. The reason for leaving the mouth of the mummy open was to enable the deceased person to justify himself before the judge of the dead. That the mummy was very carefully enclosed in its burial chamber and thus removed from the sphere of intercourse of the living, indicates a survival of the fear of demoniacal power which is characteristic of the beginnings of soul belief. The Egyptians, however, also developed the idea of a purely spiritual soul. The latter was held to exist apart from the body in a realm of the dead, from which it was supposed occasionally to return to the mummy. It was by this simple expedient of an intercourse between the various souls that mythological thought here resolved the contradiction between unity and multiplicity as affecting its soul concepts--a contradiction which even later frequently claimed the attention of philosophy.