Shen Spirit is compared to lightning in Qigong theory.  Here is the Tower card the serpent like movement of this heavenly energy enters the head to purify the mind and strengthen the upper dan tianYang and yin duality are removed through the alchemical works.  This is shown with the male and female figures falling from the tower.  We also see the physical and spiritual windows of the soul (eyes and acupoint Tian Mu) being cleaned in this card.  Perception of how one sees and experiences the world (an illusory sense of being separate from others) is being purged by baptismal fire.