He Who Eats And Drinks Unworthily The Body And Blood Of Christ
We should confess all our sins to a priest and receive from him the Body and Blood of our Lord Jesus Christ. The man who does not eat his flesh and drink his blood cannot enter into the kingdom of God (John 6:54). Only he must eat and drink worthily because he who eats and drinks unworthily, without distinguishing the body, eats and drinks judgement to himself (1 Corinthians 11:29)...
Saint Francis of Assisi
LETTER TO ALL THE FAITHFUL