On Being Blameless When Receiving The Body And Blood Of Christ

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 seriously to heart, we are condemned, when the Lord says, "I will curse your blessings."