The one being mindful of the day, he is mindful of it to the Lord. And the one not being mindful of the day, he is not mindful of it to the Lord. The one eating, he eats to the Lord; for he gives thanks to God. And the one not eating, he does not eat to the Lord, and gives thanks to God.
The cup of blessing that we bless, is it not a communion of the blood of Christ? The bread which we break, is it not a communion of the body of Christ?