The idea of the king's deified afterlife was certainly established by Old Kingdom times, however, and the same types of textual evidence are found in royal mortuary contexts throughout subsequent periods of Egyptian history. Representations of the deceased king in the presence of deities likewise indicate equailty between the two from early times.
The very purpose of the royal mortuary cult seems to have been the affirmation of the deceased monarch's divinity, yet the specific nature of the divinity must not be overlooked. A number of years ago, William Murnane showed, in a study of the texts and representations of the great mortuary temple of Ramesses III at Medinet Habu, that much of the focus of the royal mortuary cult was as ongoing reaffirmation of the king's divine kingship rather than eternal life per se. This conclusion was expanded in later studied of other mortuary temples dating back to the Old Kingdom, and it now seems clear that in many, if not all, cases the stress of all these royal mortuary establishments is on the continuation of the king's reign on a divine level in the afterlife.
It must not be forgotten that even from a relatively early date - perhaps by the end of the Old Kingdom - funerary spells for the afterlife transformation to the divine became available to other classes of society. Nobles, and later others, could also aspire to become gods in the afterlife. It is unthinkable that these individuals regarded their afterlife state to be equivalent to that of the king or the great Egyptian gods. It seems far more likely that what was envisaged for both commoner and king alike was an afterlife which represent a king of divinized state of their own social stations in life. In the case of the deceased king, there were specific associations which might be seen as elevating his position above that of his earthly reign. This is seen particularly in the concepts of the royal ancestors, and of the king as Osiris and Re.