The Divine Mercy is one of my personal favorite inspirational images.
The Devotion to the Divine Mercy was revealed in 1931 to St. Faustina when Jesus appeared to her with rays radiating from His heart. St. Faustina wrote detailed descriptions of what Jesus told her. Among them were:
I promise that the soul that will venerate this image will not perish. I also promise victory over its enemies already here on earth, especially at the hour of death. I myself will defend it as My own glory. (Diary 48)
The two rays denote Blood and Water. the pale ray stands for the Water which makes souls righteous. The red ray stands for the Blood which is the life of souls. These two rays issued forth from the very depths of My tender mercy when My agonized heart was opened by a lance on the Cross. These rays shield souls from the wrath of My Father. Happy is the one who dwell in their shelter, for the just hand of God shall not lay hold of him. (Diary 299)