The openness of the Eye of the Heart, or the wake of the Heart, is what distinguishes primordial man- and by extension the Saint- from fallen man. The significance of this inward opening may be understood from the relationship between the sun and the moon which symbolize respectively the Spirit and the Heart: just as the moon looks towards the sun and transmits something of its reflected radiance to the darkness of the night, so the Heart transmits the light of the Spirit to the night of the soul.