In the last few years, many people have taken up a devotion to the Divine Mercy according to the writings of Blessed Faustina. Sister Faustina was a young religious in a convent in Kracow, Poland. She died on October 5, 1938. During the period between 1931 and 1938, our Lord appeared to her several times with messages about His great mercy. In obedience to her spiritual director, she put all of her writings in a diary.
After her death in 1938. there was a thorough examination of her diary telling of the revelations of Christ, and the message he asked her to give to the world of his Divine Mercy, In 1973, the Holy See permitted the devotion to the Divine Mercy according to the writings of Sister Faustina.
On April 18, 1993, Sister Faustina was beatified, and was canonised by Pope John Paul on October 2000
Blessed Faustina described our Lord's appearance to her in 1931: "In the evening, when I was in my cell, I became aware of the Lord Jesus clothed in a white garment. One hand was raised in blessing, the other was touching the garment at the breast. From the opening of the garment at the breast there came forth two large rays, one red and the other pale. In silence I gazed intently at the Lord; my soul was overwhelmed with fear, but also with great joy. After a while Jesus said to me, “paint an image according to the pattern you see, with the inscription: Jesus, I trust in You.”
Our Lord explained this image to her: "
"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 depths of My most tender Mercy at that time when My agonizing Heart was opened by a lance on the Cross. ... Fortunate is the one who will dwell in their shelter, for the just hand of God shall not lay hold of him." She had an artist privately paint a the vision of Our Lord according to her description. It was only after her death that the Abbess of the convent discovered the painting and the diary.
Jesus also spoke of a Feast of the Divine Mercy and confession and Holy Communion on that day. He said: "I want this image to be solemnly blessed on the first Sunday after Easter; that Sunday is to be the Feast of Mercy. On that day, the depth of My Mercy will be open to all. Whoever will go to confession and Holy Communion on that day will receive complete forgiveness of sin and punishment. Mankind will not enjoy peace until it returns to My Mercy."