Egyptian beliefs about future existence are not readily defined because the Egyptians are a very ancient civilization, making it difficult to study their religious documents.
We can arrive at this answer because:
The Egyptians constitute a millenary civilization, with several different types of documents and that developed over time.
This meant that the Egyptians had a very wide variety of religious documents.
In addition, the Egyptian religion and society was influenced by other societies over time, which changed their beliefs and culture.
This made the study of Egyptian documents difficult and translated into many different languages, which had to adapt and simplify many concepts, which often left the Egyptian beliefs imprecise and poorly defined.
