Translated using ChatGPT. Annotations in purple have been added to the end of the commentary and reflect the teaching of the Catechism of the Catholic Church.
Although this discourse was delivered to the crowds, and even though it may seem to concern people occupied with worldly matters or to be spoken generally, nevertheless it is directed especially to the Apostles. For at the beginning of this chapter it was said: “His disciples came to him, and opening his mouth he taught them.” (Mt 5:2)
Mt 5:13 You are the salt of the earth. But if the salt loses its saltiness, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled underfoot.
By this he teaches that just as food into which salt has been placed becomes corrupted if the salt itself is spoiled, and is trampled underfoot by people on the road where it has been spilled, so too an indiscreet prelate, or one who lives without exemplary conduct, neither seasons nor directs the hearts of his subjects, nor can he benefit them, but rather harms them. For this reason he is unworthy of authority and deserves to be removed from office, humbled, and placed under obedience.
Therefore Paul admonishes Timothy—and indeed every prelate—saying: “Be an example of the faithful” (1 Tim 4), “for in doing this you will save both yourself and those who hear you.” Luke also says (Lk 6:20) that Jesus, “lifting up his eyes upon his disciples, said…” Addressing them now, therefore, he teaches what sort of men they ought to be, both they themselves and their successors, namely all prelates.
“You are the salt of the earth,” that is, the seasoning of human beings living upon the earth, because through discretion and through your exemplary manner of life, the hearts of others ought to be seasoned and directed—by word, by conduct, by charity—so that they may have the savor of virtuous works and be preserved from the rottenness of vices, just as salt gives flavor to food and preserves it from corruption.
By salt, therefore, discretion is signified, which is necessary in every work. For this reason it is said in Leviticus: “Whatever sacrifice you offer, you shall season with salt; in every offering you shall offer salt.” Hence the Savior says in Mark 9: “Have salt in yourselves.” And because the examples of superiors most of all direct and preserve the souls of their subjects, the Lord speaks fittingly to prelates, and by salt especially is designated exemplary conduct.
But if the salt has lost its savor—that is, if it has become corrupted and lost its vigor—“with what shall it be salted?” That is, by what can it season anything? Nothing at all. For then it infects food rather than benefits it. Therefore it is added: “It is good for nothing anymore except to be thrown out,” that is, to be entirely cast away, lest it cause harm.
Mt 5:14 You are the light of the world. A town built on a hill cannot be hidden.
Next, Christ compares them to light: “You are the light of the world,” that is, teachers of people dwelling in the world, because you ought to illumine the minds of others with the ray of wisdom and knowledge, teaching them what must be believed, what must be hoped for, what must be loved, and how they ought to discern between good and evil, between true and false, between precious and worthless things. Of such shepherds it is said: “I will give you shepherds according to my heart, and they shall feed you with knowledge and doctrine.”
From this it is clear that a shepherd of others ought to be outstanding in action and sublime in contemplation—indeed, perfect in both forms of life—so that he may be able, after the manner of the heavenly hierarchy, to purify, illumine, and perfect the flock committed to him.
“A town built on a hill cannot be hidden,”
that is, built in a lofty place, for it is visible to all, even from
afar. So you, shepherds of others and the Church of prelates, who are
founded upon Christ the mountain, must act in such a way that your
heavenly Father may be glorified, praised, and known as just through the
holiness of your life.
For God is dishonored by wicked servants and praised by good ones, as the Apostle says of some: “Through you the name of God is blasphemed among the Gentiles.” And through Ezekiel the Lord frequently says: “You have profaned my holy name,” and again: “I will sanctify my great name which was profaned among the nations.”
For if Gentiles and unbelievers
should see a Christian living in all things holy and irreproachable,
would they not say: “Truly holy and true is the law that forms such a
life, and holy is the Lord to whom such a life is pleasing”? But if they
see a Christian acting wickedly, do they not immediately ridicule the
law of Christ and suspect that such is the Lord as are his servants? The
faithful and good, however, when they see someone living honorably and
holily, at once praise the grace of God, glorify God in his servant, and
exalt the Most High, whose mercy they admire—as is said in Daniel.
“It has grown into a great mountain.” You ought not to hide the wisdom granted to you nor allow it to remain concealed, for it is written: “Hidden wisdom and an unseen treasure—what profit is there in either?” (Sirach 20:32).
Mt 5:15 Neither do people light a lamp and put it under a bowl.
Instead, they put it on a stand and it gives light to everyone in the
house.
The same (lesson of the city on the hill) is shown through the comparison of the lamp: “Nor do people light a lamp and put it under a bushel.”
That is, when they light it, they do not normally hide it once lit,
except perhaps for a time, so that at the proper moment it may be placed
on the lampstand.
But alas, many now undertake the care of others in whom there is neither the water of saving wisdom (Sirach 15:3) nor the bread of holy conduct. If such men were to examine themselves carefully when they place themselves in public, or set themselves upon the lampstand, I think they would say what is written in Isaiah: “I am not a physician, and in my house there is no bread; do not make me the ruler of the people.” Of such men Isaiah speaks again in the fifty-sixth chapter: “Blind watchmen, mute dogs, unable to bark, seeing vain things and sleeping.”
“So that it may give light to all who are in the house.” In like manner God did not illumine the Apostles with such an abundance of the light of wisdom so that they should be hidden or remain concealed, but so that they might pour the light of truth upon the whole world. Therefore it is added: “So let your light shine,” that is, let your virtuous and radiant manner of life be manifested openly before people, that they may see your good works and glorify your Father who is in heaven.
But since it is written of John—“among those born of women there has not arisen a greater”—that “he was not the light,” how are the Apostles called “the light of the world”? The answer is that John was not the principal and substantial light, but a ministerial and participated one.
Finally, there is a threefold light. First, the light which illumines and is not illumined—namely God; and thus Christ according to his divine nature was light, but not John. Second, the light which both illumines and is illumined—such especially were John, the holy Apostles, and the Prophets. Third, the light which is illumined but does not illumine, as the Apostle says of penitents and converts: “You were once darkness, but now you are light in the Lord” (Eph 5:8).
That the Apostles and prelates ought to communicate to others the wisdom given to them and publicly preach it, and also edify others by the splendor of virtues, the Savior shows by two comparisons: that of a city set on a height, and of a lamp that has been lit.
Mt 5:16 In the
same way, let your light shine before others, that they may see your
good deeds and glorify your Father in heaven.
Therefore we ought not to perform good works before others, nor manifest our virtues, for our own praise, but for the honor of God and also for the edification of our neighbors; and finally, we ought to desire to please God alone. For this reason the Savior says: “Take care not to practice your righteousness before men in order to be seen by them.”
Furthermore, it must be known that among good works, some are common, to which we are commonly bound, and which have no appearance of singular sanctity or affectation; these should be done openly before others. Others are works of special devotion and eminent holiness; these should rather be hidden, lest a person be excessively esteemed or honored, or incur the appearance of hypocrisy or seem singular.
Therefore we should not publicly strike the breast in a special manner, emit sighs, or stretch out the hands toward heaven, but be content with the ordinary outward conduct of the exterior person, while inwardly always yearning for the highest devotion.
Denis’s reading of “You are the salt of the earth”
presupposes a profoundly ecclesial anthropology: those entrusted with
authority in the Church exist not for themselves but as instruments
through whom God preserves, orders, and vivifies others. This aligns
closely with the Catechism’s teaching that authority in the Church is
never autonomous or self-referential but always ministerial, ordered
toward the salvation of souls. The CCC teaches that ecclesial authority
“is exercised in the name of Jesus Christ” and must be modeled on
Christ’s own self-giving service (CCC 876, 878).
Denis’s insistence that a prelate who lacks discretion and exemplary
conduct “neither seasons nor directs the hearts of his subjects”
reflects the Catechism’s claim that pastors are configured to Christ the
Head precisely so that they may act as living signs of his shepherding
care (CCC 1548, 1551).
Denis’s insistence that such a prelate is indignus prælatione—unworthy
of office—and deserves removal and humiliation resonates with the
Catechism’s sober realism about sin within the Church. While the Church
herself is holy, her members, including her ministers, remain capable of
grave failure (CCC 827).
Denis’s argument is not punitive for its own sake; it is medicinal and
ecclesial. Authority that no longer serves sanctification forfeits its
legitimacy, echoing the Catechism’s teaching that obedience is never
blind submission to moral disorder, even within ecclesial structures
(CCC 1902–1903, applied analogically).
The metaphor of salt as discretion touches a key moral virtue. Denis’s emphasis corresponds to what the Catechism describes as prudence (prudentia / φρόνησις),
“the virtue that disposes practical reason to discern our true good in
every circumstance and to choose the right means of achieving it” (CCC 1806).
For Denis, discretion is not mere tact but the capacity to preserve
others from corruption. This is why he links salt with Levitical
sacrifice: every offering must be seasoned, because no action pleasing
to God is free from moral discernment. The Catechism reinforces this
sacrificial dimension of moral life when it teaches that all Christian
action is meant to become a “spiritual sacrifice” united to Christ (CCC 901, 2100).
His severe lament—“heu multi”—over shepherds lacking both “the water of saving wisdom” and “the bread of holy conduct” anticipates the Catechism’s warning against a separation of doctrine and life. The CCC teaches that the credibility of the Church’s moral teaching depends upon the witness of her members, especially her ministers (CCC 2044). Evangelization is undermined when proclamation is contradicted by conduct. Denis’s citation of Isaiah’s “blind watchmen” corresponds directly to the Catechism’s claim that those who teach must themselves be formed by the truth they transmit (CCC 2039).
The discussion of light that must not be hidden brings Denis into direct conversation with the Catechism’s theology of witness. Christians are not only recipients of revelation but living testimonies to it (CCC 905, 2472). Denis carefully balances this with Christ’s warning against ostentation in Matthew 6. The Catechism makes the same distinction: good works are meant to glorify God, not the self (CCC 2099, 2104). Denis’s differentiation between opera communia (common obligations) and opera singularis devotionis (special acts of devotion) parallels the Catechism’s teaching on interior intention. Acts of piety lose their value when they become self-referential rather than God-directed (CCC 2111, 2520).
Finally, Denis’s reflection on how the moral life of Christians affects unbelievers is profoundly missionary and fully consonant with the Catechism. Scandal disfigures the face of Christ before the world, while holiness renders God credible. The CCC teaches that the Church’s holiness must be made visible “in the lives of her members” so that the world may glorify the Father (CCC 824, 2045). Denis’s stark contrast—Gentiles either glorifying God or blaspheming him based on Christian conduct—echoes the Catechism’s teaching that Christians bear responsibility for the reception or rejection of the Gospel by others (CCC 2471, 2284–2287).
In sum, Denis the Carthusian offers not merely an exegetical gloss on Matthew 5, but a full theology of ecclesial authority ordered toward sanctification, deeply consonant with the Catechism’s doctrine of office, virtue, scandal, and witness. His medieval imagery sharpens what the Catechism expresses systematically: that in the Church, to teach is to live, to govern is to serve, and to shine is to burn away corruption first within oneself.
CONTINUE
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