A. H. Sayce,
The Religions of Ancient Egypt and Babylonia
“ In Hermopolis the conception of creation, not by voice merely, but even by the mere sound of the voice, was first formed and worked out while Heliopolis was the source of that arrangement of the deities into groups of nine which led to the identification of the gods one with another, and so prepared the way for monotheism.7 If Heliopolis were indeed, as seems probable, the first home of this religious theory, its influence upon the rest of Egypt was profound. ”
