"Let no one, under pretense of abstinence, aim at merely changing rather than eliminating pleasures, so that he seeks costly food because he is abstaining from meat, and rare liquors because he is not drinking wine, lest in the process, as it were, of taming the flesh he give greater rein to the demands of pleasure. Indeed, for the clean all food is clean, but for no one is luxury clean. "

St. Augustine, “Sermon 205: On the Beginning of Lent”