Know that if you neglect the matter of the painting of the image and the whole work of mercy, you will have to answer for a multitude of souls on the day of judgment (Diary, 154).
Not in the beauty of the color, nor of the brush lies the greatness of this image, but in My grace (Diary, 313).
The greatness of this image
Devotion to the souls in Purgatory contains in itself all the works of mercy, which supernaturalized by a spirit of faith, should merit us Heaven. de Sales