In Egyptian mythology, Sia or Saa was the deification of perception in the Heliopolitan Ennead cosmogony and is probably equivalent to the intellectual energies of the heart of Ptah in the Memphite cosmogeny.The Routledge Dictionary of Egyptian Gods and Goddesses, George Hart ISBN 0-415-34495-6 He also had a connection with writing and was often shown in anthropomorphic form The Complete Gods and Goddesses of Ancient Egypt, Wilkinson ISBN 0-500-05120-8 holding a papyrus scroll.
