John 2:8-10
At that time, then, Jesus made of water wine, and both then and now He ceases not to change our weak and unstable wills. For there are, yes, there are men who in nothing differ from water, so cold, and weak, and unsettled. But let us bring those of such disposition to the Lord, that He may change their will to the quality of wine, so that they be no longer washy, but have body, and be the cause of gladness in themselves and others. But who can these cold ones be? They are those who give their minds to the fleeting things of this present life, who despise not this world's luxury, who are lovers of glory and dominion: for all these things are flowing waters, never stable, but ever rushing violently down the steep.
The rich today is poor tomorrow, he who one day appears with herald, and girdle, and chariot, and numerous attendants, is often on the next the inhabitant of a dungeon, having unwillingly quitted all that show to make room for another. Again, the gluttonous and dissipated man, when he has filled himself to bursting, cannot retain even for a single day the supply conveyed by his delicacies, but when that is dispersed, in order to renew it he is obliged to put in more, differing in nothing from a torrent.
For as in the torrent when the first body of water is gone, others in turn succeed; so in gluttony, when one repast is removed, we again require another. And such is the nature and the lot of earthly things, never to be stable, but to be always pouring and hurrying by; but in the case of luxury, it is not merely the flowing and hastening by; but many other things that trouble us. By the violence of its course it wears away the strength of the body, and strips the soul of its manliness, and the strongest currents of rivers do not so easily eat away their banks and make them sink down, as do luxury and wantonness sweep away all the bulwarks of our health; and if you enter a physician's house and ask him, you will find that almost all the causes of diseases arise from this.
For frugality and a plain table is the mother of health, and therefore physicians have thus named it; for they have called the not being satisfied “health,” (because not to be satisfied with food is health,) and they have spoken of sparing diet as the “mother of health.” Now if the condition of want is the mother of health, it is clear that fullness is the mother of sickness and debility, and produces attacks which are beyond the skill even of physicians. For gout in the feet, apoplexy, dimness of sight, pains in the hands, tremors, paralytic attacks, jaundice, lingering and inflammatory fevers, and other diseases many more than these, (for we have not time to go over them all,) are the natural offspring, not of abstinence and moderate diet, but of gluttony and repletion.
And if you will look to the diseases of the soul that arise from them, you will see that feelings of coveting, sloth, melancholy, dullness, impurity, and folly of all kinds, have their origin here. For after such banquets the souls of the luxurious become no better than asses, being torn to pieces by such wild beasts as these (passions). Shall I say also how many pains and displeasures they have who wait upon luxury? I could not enumerate them all, but by a single principal point I will make the whole clear.
At a table such as I speak of, that is, a sumptuous one, men never eat with pleasure; for abstinence is the mother of pleasure as well as health, while repletion is the source and root not only of diseases, but of displeasure. For where there is satiety there desire cannot be, and where there is no desire, how can there be pleasure? And therefore we should find that the poor are not only of better understanding and healthier than the rich, but also that they enjoy a greater degree of pleasure.
Let us, when we reflect on this, flee drunkenness and luxury, not that of the table alone, but all other which is found in the things of this life, and let us take in exchange for it the pleasure arising from spiritual things, and, as the Prophet says, delight ourselves in the Lord; “Delight yourself in the Lord, and He shall give you the desires of your heart”; that so that we may enjoy the good things both here and hereafter, through the grace and lovingkindness of our Lord Jesus Christ, by whom and with whom, to the Father and the Holy Ghost, be glory, world without end. Amen.
Source: Homilies on the Gospel of John (New Advent)