In the life of Bl. Henry of Suso, we read that as a young man he made this agreement with a brother of his religious order: "Whichever one of us outlives the other, let him hasten the glory of the one who has passed into eternity with the celebration of one Holy Mass every week." The companion of Bl. Henry died first in a mission territory. Blessed Henry remembered his promise for a little while. Later, because he had been obliged to celebrate Masses for others, instead of the weekly Mass which he had promised his friend, he substituted prayers and penances. But his friend appeared to him in a vision, much distressed, and reproved him, "Your prayers and your penances are not sufficient for me. I need the Blood of Jesus." Indeed it is with the Blood of Jesus that we pay the debts of our sins (Col. 1:14).
~ From Jesus Our Eucharistic Love by Fr. Stefano Manelli, O.F.M. ~