For he that eats and drinks unworthily, eats and drinks judgment to himself, not discerning the Lord's body.
All Commentaries on 1 Corinthians 11:29 Go To 1 Corinthians 11
John Chrysostom
AD 407
What do you say, tell me? Is this Table which is the cause of so many blessings and teeming with life, become judgment? Not from its own nature, says he, but from the will of him that approaches. For as His presence, which conveyed to us those great and unutterable blessings, condemned the more them that received it not: so also the Mysteries become provisions of greater punishment to such as partake unworthily.
But why does he eat judgment to himself? Not discerning the Lord's body: i.e., not searching, not bearing in mind, as he ought, the greatness of the things set before him; not estimating the weight of the gift. For if you should come to know accurately Who it is that lies before you, and Who He is that gives Himself, and to whom, you will need no other argument, but this is enough for you to use all vigilance; unless you should be altogether fallen.