We are used to taking disorders in human relationships as a given, and if we are upset by them...
We are used to taking disorders in human relationships as a given, and if we are upset by them, it is often simply because they throw us off balance. But for the apostle, our quarreling and dark feelings toward a neighbor who has done something a little better than we have are things of the same order as feasting, drunkenness, and sensuality. This is exactly because both drunkenness and quarrels are the result of self-will, the result of our concerns for ourselves, both bodily and emotional, subordinating our striving for the good.
It is not for nothing that Paul, a little earlier, repeats Christ's words about the greatest commandment, which embraces all the others: to love your neighbor as yourself. After all, quarrels and envy, that is, sins against our neighbor, have their source in our lack of love both for our neighbor (and this is more or less obvious) and for ourselves (and this is no less important). This second part of the commandment is often not fully understood by us. Love is acceptance, and its foundation is self-acceptance, an adequate understanding of our abilities and their limits. To accept ourselves, it is very important to understand that we are not superhumans and never will be, that our abilities are not unlimited, and that we often take on too much and from exhaustion begin hurting our neighbors. Many quarrels can be avoided simply by acknowledging our tiredness and realizing that a constructive conversation should be put off until later. And our flesh often experiences many needs that require satisfaction. But for food not to turn into gluttony, it is important to understand ourselves and our needs well; it is important to understand that simple food is in fact enough for us. This is what Paul is talking about: "make no provision for the flesh, to gratify its desires."
And if we love ourselves as we are, accepting and recognizing our sins without turning repentance into self-torment, it will become much easier to love our neighbor. Because others are exactly the same as we are, just as imperfect. And God gives us only one means to cope with our human limitation: love.
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13:14 But put ye on the Lord Jesus Christ - Herein is contained the whole of our salvation. It is a strong and beautiful expression for the most intimate union with him, and being clothed with all the graces which were in him. The apostle does not say, Put on purity and sobriety, peacefulness and benevolence; but he says all this and a thousand times more at once, in saying, Put on Christ.And make not provision - To raise foolish desires, or, when they are raised already, to satisfy them.