John Chrysostom
"Food is for the belly" (1 Cor 6:13).
Here by "belly" he means not the stomach, but gluttony. So too in another place, when he says, "their god is the belly" (Phil 3:19), he means not the member of the body, but satiety.
That this is so, hear the following words: "and the belly for food. But the body is not for fornication, but for the Lord."
The belly is also body. But he makes two pairings: foods and gluttony, which he called belly; Christ and the body.
What then does "food is for the belly" mean? Food, he says, has a close connection with gluttony, and gluttony with food. Therefore it cannot lead us to Christ, but draws us to food.
This is a harsh and savage passion. It enslaves and compels one to serve it.
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Why, then, man, are you attached to food? This is where that service ends and leads to nothing more. It subdues as to some mistress, holds one in this slavery, and produces nothing but this vanity.
Moreover, by being mutually joined, they also mutually destroy themselves: "the belly for foods, and foods for the belly." They perform a useless cycle.
It is like a decaying body producing worms, and the worms destroying that body. Or it is like a wave that rises and falls and produces nothing more.
He says this not about food and the body, but rebukes the passion of gluttony and excess in food. The following words show this: "But God will destroy both this and that."
He means not the stomach, but immoderate desire; not food, but satiety. He does not condemn the first, but even prescribes this rule concerning it: "Having food and clothing, let us be content with these" (1 Tim 6:8).
He condemns the sinful action, and at the conclusion of his discourse corrects it by prayer.
Some say that his words contain a prophecy about the state in the age to come, namely, that there we shall neither eat nor drink.
If moderate use of food will have an end, then one must all the more abstain from excess.
Then, lest anyone think that he condemns the body, or conclude that from a part he transfers condemnation to the whole, and say that the body by nature causes adultery, listen to what he says next.
He says: I do not condemn the nature of the body, but the immoderate love of pleasure in the soul. Therefore he adds: "But the body is not for fornication, but for the Lord."
It was not created for you to live intemperately and commit adultery. Likewise the belly was not created so that you might give yourself to gluttony, but so that it might serve Christ as Head, and He might be Lord of the body.
Let us then be ashamed and afraid. Having been counted worthy of such honor, and having become members of Him who is Head over us, we dishonor ourselves by such vices.