An Egyptian symbol of our Innermost Being. On the Tree of Life, this is represented by the sephirah Chesed.
"Osiris is the Father who is in secret, the particular Monad of every one." - Samael Aun Weor, The Unconscious Itself
"You must pull the light from the darkness in the underworld so that you may reach your Father Osiris, the Innermost, your real Being..." - Samael Aun Weor, The Chapter of Bringing Along a Boat in the Underworld