The High Priestess sits between the pillars of Boaz and Jachin representing strength and stability.  She holds the Torah in her hand representing Divine Knowledge passed down to humanity.  She wears the lunasolar crown revealing a dual nature.  She is a mysterious figure reveals only that which needs to be revealed. She sits at the doorway between worlds.  The river behind her is the subconscious.  The pomegranates represent the seeds of life.  The Moon at her feet indicates over coming emotional desires.