When Helen Kowalska (1905-1938) entered the Congregation of the Sisters of Our Lady of Mercy as Sister Faustina, she also entered a spiritual "dark night." That night ended when, transformed by this experience, she recognized God's love for her in the sufferings of Jesus; instructed by him in a vision, she produced the Image of the Divine Mercy. These selections, taken from the diary that her spiritual director encouraged her to keep,...