'I also beseech in the Lord, all my brothers who are, or who shall be, or who desire to be priests of the Most High, that whenever they wish to celebrate Mass, they be pure, and offer with purity and reverence the true Sacrifice of the most holy Body and Blood of Our Lord Jesus Christ with a holy and perfect intention; not from any earthly motive, nor for the fear or love of any creature, as though desiring to please men; but let every will (according to the grace given) be directed solely to the most High God, and do you desire to please Him alone, for He alone works in this holy Sacrifice according to His good pleasure, as the Lord has Himself said: "Do this in remembrance of Me:" and he who does otherwise becomes a traitor like Judas. Remember, O priests, my brothers, how it is written in the law of Moses, that those who transgressed even in corporal sacrifices were condemned by God to death, without any mercy. What a far more terrible punishment will he deserve, who tramples under foot the Son of God, and treats the Blood of the New Testament by which he is sanctified as a vile thing, and offers insult to the Holy Ghost! A man stained with sin despises and tramples on the Lamb of God, when, as the Apostle says, not discerning the sacred Bread, which is Christ, from other food, he eats unworthily by being guilty of unworthy actions; for the Lord has said by His Prophet: "Cursed is the man who does the work of God with negligence or fraud." And on account of those priests who will not lay these things seriously to heart, we are condemned, when Our Lord says: "I will curse your blessings."'