Sia
Also known as Saa
Sia was
the personification of perception and could be said to be the
equivalent of the 'heart' of mind of the god Ptah which
underlay creation in the Memphite theology. According to myth,
Sia, like Hu - the god personifying spoken command or utterance
- came into existence from drops of blood spilled from the cult
phallus of the sun god Ra. Hu also might be equated with the
spoken creative word of Ptah, so that just as Ptah created
everything through the two aspects of mind and word, the two
deities Sia and Hu form a dyad which would seem to represent
the same aspects of the mind and word of Ra. Usually depicted
in anthropomorphic form, during the Old Kingdom Sia was
visualized as a kind of divine functionary who stood at the
right side of Ra and held the god's sacred papyrus scroll. In
the New Kingdomo too, Sia was depicted, along with Hu and other
Egyptian gods, accompanying the sun god in his underworld
barque, as in a number of the tombs in the Valley of the
Kings.
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