Let not him that eats despise him that eats not; and let not him who eats not judge him that eats: for God has received him.
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Augustine of Hippo
AD 430
Paul wanted to keep the balance, by which scandals are avoided, between those who fast on Saturday and those who do not, so that the one who eats would not despise the one who does not eat, and the one who fasts would not judge the one who eats.