St. Basil of Caesarea ca. 330-379
Question: What is the fear with which the Body and Blood of Christ are to be received by us? A kind of certainty, or a kind of feeling?
Answer: The Apostle teaches us this fear when he says, “Anyone who eats and drinks unworthily eats and drinks judgment on himself.” Certainty is effected by faith in the words of the Lord, when He says, “This is My Body, which is given for you; do this in remembrance of me.” (On Rules Briefly Treated 74)