Zelia Nuttall,
The Fundamental Principles of Old and New World Civilizations
“ Ka (duality) is commonly expressed by an uplifted pair of arms; a variant being the whole figure of a man with raised arms (7 and 8) . The fact that the name for phallus was also ka, explains its employment as a sacred symbol, recorded by Herodotus, which proves to what extremes the ancient rebus-writers went in their naïve invention and multiplication of secret signs and modes of expressing the names and attributes of their “hidden god.” ”
