A special role in entreating God’s mercy for the world is played by suffering.
“There is but one price at which souls are bought”, Jesus told St. Faustina, “and that is suffering united to My suffering on the cross” (Diary 324).
“Every conversion of a sinful soul demands sacrifice” (Diary 961). The Lord Jesus told St. Faustina: “I have need of your sufferings to rescue souls” (Diary 1612).”Help Me, My daughter to save souls. Join your sufferings to My Passion and offer them to the Heavenly Father for sinners” (Diary 1032).