It may be advanced with much certainty, that the Hebrew people residing in Ancient Egypt, must have been acquainted with many of the Egyptian ideas on the subject of the eternal future life of the soul of the dead, and the reward or punishment of it in that future life, for these ideas were undoubtedly widely and generally known by the Egyptian people, and were too thoroughly formulated in the active and daily life of the Ancient Egyptian population, not to have been known by the Hebrews living in daily contact with them, but the Hebrews may not have accepted them as a verity. It may have been, that as the idea of the future existence of the soul in its perfection, was based upon the mummification and preservation of the body of the dead, so that the _Ka_ might remain with it, and go out and revisit it in the tomb; and also, on inscriptions either on the walls of the tomb or the papyri deposited with the body; that Moses, knowing that in his wanderings and journeyings, it would be impossible to have performed those ceremonies and preliminaries necessary under the Egyptian system, for the proper burial of the corpse; its mummification and the preparation of the funeral inscriptions or papyri, considered as necessary to be inscribed on the walls of the tomb, or on the papyri, to be buried with the corpse, so as to assist the soul against the perils it was supposed it would encounter in its journey through the Underworld;[3] was therefore compelled to abandon a dogma based on preliminaries and preparations he could not, during such wanderings, have performed. This would be partly an explanation of a subject which has for many years caused much dispute among very erudite theologians. In order to get some knowledge of the religious philosophical ideas of the Ancient Egyptians, a thorough study of the collection of papyri called, the _Per-em-hru_ or Book of the Dead, is absolutely necessary, also the texts on the walls of the tombs of the Ancient Empire especially those found at Saqqarah. The work of M. Edouard Naville on the _Per-em-hru_ lately published, although it refers more especially to the Theban period, is of great value in this investigation, and when it has been translated into a modern language by a thoroughly competent scholar, will be a key to open many of the now hidden but elevated ideas in the religious philosophy of the Ancient Egyptians.