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Commentary

Luke 17:4

And if he trespass against thee seven times in a day, and seven times in a day turn again to thee, saying, I repent; thou shalt forgive him.

And if he sins against you seven times in a day, and seven times in a day turns back to you, saying: I repent, forgive him. The number seven does not set a limit for granting forgiveness, but either commands that all sins should be forgiven, or that the one repenting should always be forgiven. For often the universality of any matter or time is indicated by the number seven. Hence it is sung in the psalm: Seven times a day I have praised you (Psalm 119), which means nothing other than His praise is always in my mouth (Psalm 34). For elsewhere too, when Peter asked how many times he should forgive a brother sinning against him, and he said up to seven times, the Lord replied: I do not say to you up to seven times, but up to seventy times seven (Matthew 18), that is, four hundred and ninety times. So you should forgive your brother sinning that many times in a day, as he could not sin that many times. Therefore, if a brother sins against you and repents, you have the power, indeed the necessity, to forgive him, so that the Father who is in heaven may also forgive you when you repent an…
And if he sins against you seven times in a day, and seven times in a day turns back to you, saying: I repent, forgive him. The number seven does not set a limit for granting forgiveness, but either commands that all sins should be forgiven, or that the one repenting should always be forgiven. For often the universality of any matter or time is indicated by the number seven. Hence it is sung in the psalm: Seven times a day I have praised you (Psalm 119), which means nothing other than His praise is always in my mouth (Psalm 34). For elsewhere too, when Peter asked how many times he should forgive a brother sinning against him, and he said up to seven times, the Lord replied: I do not say to you up to seven times, but up to seventy times seven (Matthew 18), that is, four hundred and ninety times. So you should forgive your brother sinning that many times in a day, as he could not sin that many times. Therefore, if a brother sins against you and repents, you have the power, indeed the necessity, to forgive him, so that the Father who is in heaven may also forgive you when you repent and ask for mercy. But if he, having been reprimanded, neglects to convert and to do penance, consider what the judgment of truth decrees about this. If your brother sins against you, go and correct him, and so on, up to where he says: If he refuses to listen even to the church, let him be to you as a Gentile and a tax collector. And deservedly so, because under the name of the faithful he performed the works of the unfaithful. Certainly, we are commanded to give forgiveness differently to a brother who asks for it and differently to an enemy who persecutes. To the former, so that, having received forgiveness for the sin by which he harmed us innocents, he may join us in communal charity; to the latter, that while he wishes evil upon us and, if possible, does it, we may always wish and do good to him as far as we can. For David could not extend the same measure of forgiveness to his persecutors, deprived of the remedy of penance and despite compassionately mourning for them, as Joseph kindly and recognizably extended to his brothers, corrected with salutary contrition.
Luke 17:5 · 2 passages

And the apostles said unto the Lord, Increase our faith.

The apostles said to the Lord: Increase our faith. The Lord had said earlier: He who is faithful in a very little is also faithful in much. And if you have not been faithful in that which is another's, who will give you that which is your own? And so the apostles, who were already faithful in what is another's and in the very little, that is, in the contempt of earthly things, ask that faith be increased in what is their own and in what is greater. For no one becomes supreme suddenly, but in good conduct each one begins with little things, so that he may reach great things. For the beginnings of virtue are one thing, its progress another, its perfection yet another. Hence, earnestly seeking, they say to the Lord: Increase our faith.
Or our Lord here compares perfect faith to a grain of mustard seed, because it is lowly in appearance, but fervid in heart. But mystically by the mulberry tree, (whose fruit and branches are red with a blood-red colour,) is represented the Gospel of the cross, which, through the faith of the Apostles being uprooted by the word of preaching from the Jewish nation, in which it was kept as it were in the lineal stock, was removed and planted in the sea of the Gentiles.
Luke 17:6

And the Lord said, If ye had faith as a grain of mustard seed, ye might say unto this sycamine tree, Be thou plucked up by the root, and be thou planted in the sea; and it should obey you.

The Lord said: If you had faith as a grain of mustard seed, you would say to this mulberry tree: Be uprooted, and be transplanted into the sea, and it would obey you. He compares perfect faith to a grain of mustard seed, which is indeed humble to the face and fervent in the heart, seen as vile to those looking upon it everywhere and appearing to have no strength, but when pressed it shows what perfection it carries inside. It should also be noted that a grain of mustard serves very beneficially for the purgation of the head. For if you thoroughly grind it and sift it with tepid fatty honey, and gargle with it fasting under the warm sun or in the bath, it purges all harmful moisture from the head even if it is quite thick, and it prevents imminent weaknesses from arising. Thus indeed, faith tested by the pestle of temptations, sifted through the sieve of discernment from all the surface of light thoughts, and sweetened with the honey of perfect love, not only exhausts all vices from the heart, which is the head of our inner man, but it also prevents them from being able to gather in t…
The Lord said: If you had faith as a grain of mustard seed, you would say to this mulberry tree: Be uprooted, and be transplanted into the sea, and it would obey you. He compares perfect faith to a grain of mustard seed, which is indeed humble to the face and fervent in the heart, seen as vile to those looking upon it everywhere and appearing to have no strength, but when pressed it shows what perfection it carries inside. It should also be noted that a grain of mustard serves very beneficially for the purgation of the head. For if you thoroughly grind it and sift it with tepid fatty honey, and gargle with it fasting under the warm sun or in the bath, it purges all harmful moisture from the head even if it is quite thick, and it prevents imminent weaknesses from arising. Thus indeed, faith tested by the pestle of temptations, sifted through the sieve of discernment from all the surface of light thoughts, and sweetened with the honey of perfect love, not only exhausts all vices from the heart, which is the head of our inner man, but it also prevents them from being able to gather in the future. And the mulberry tree to be uprooted and transplanted into the sea, or simply placed, can be understood because it evidently is a sign of consummate faith commanding the elements with a word, so that what was said of one thing in particular is believed to apply generally to all. Finally, the Lord says elsewhere when the fig tree withered by the word, and the disciples marveled: If you have faith and do not doubt, not only will you do what is done to the fig tree, but if you say to this mountain, be taken up and cast into the sea, it will happen (Matthew XXI). Or certainly by the mulberry tree, whose fruit and twigs redden with a bloody color and hence is called "rubus" in Latin, the Gospel of the cross is expressed, which through the faith of the apostles, having been uprooted from the Jewish people in whom it was held as in a stem of origin, was transplanted and planted into the sea of the Gentiles. The sense is also supported by the parables joined to this sentence, which deals with the ministers of the word. It is also helpful to note that mulberry leaves, when thrown on a serpent, bring death to it because the word of the cross, while bringing health to all, takes away all harmful things.
Luke 17:7-10 · 3 passages

But which of you, having a servant plowing or feeding cattle, will say unto him by and by, when he is come from the field, Go and sit down to meat?

Or the servant departs from the field when giving up for a time his work of preaching, the teacher retires into his own conscience, pondering his own words or deeds within himself. To whom our Lord does not at once say, Go from this mortal life, and sit down to meat, that is, refresh thyself in the everlasting resting-place of a blessed life. He bids make ready wherewith he may sup, that is, after the labours of public discourse, He bids him humble himself in self-examination. With such a supper our Lord desires to be fed. But to gird one's self is to collect the mind which has been enfolded in the base coil of fluctuating thoughts, whereby its steps in the cause of good works are wont to be entangled. For he who girds up his garments does so, that in walking he may not be tripped up. But to minister unto God, is to acknowledge that we have no strength without the help of His grace. Servants, I say, because bought with a price; (1 Cor. 6:20) unprofitable, for the Lord needeth not our good things, (Ps. 16:2) or because the sufferings of this present time are not worthy to be compare…
Or the servant departs from the field when giving up for a time his work of preaching, the teacher retires into his own conscience, pondering his own words or deeds within himself. To whom our Lord does not at once say, Go from this mortal life, and sit down to meat, that is, refresh thyself in the everlasting resting-place of a blessed life.

He bids make ready wherewith he may sup, that is, after the labours of public discourse, He bids him humble himself in self-examination. With such a supper our Lord desires to be fed. But to gird one's self is to collect the mind which has been enfolded in the base coil of fluctuating thoughts, whereby its steps in the cause of good works are wont to be entangled. For he who girds up his garments does so, that in walking he may not be tripped up. But to minister unto God, is to acknowledge that we have no strength without the help of His grace.

Servants, I say, because bought with a price; (1 Cor. 6:20) unprofitable, for the Lord needeth not our good things, (Ps. 16:2) or because the sufferings of this present time are not worthy to be compared to the glory which shall be revealed in us. (Rom. 8:18.) Herein then is the perfect faith of men, when having done all things which were commanded them, they acknowledge themselves to be imperfect.
Who, when he returns from the field, would immediately say to him, "Come along, sit down," and would not say to him, "Prepare what I may eat"? The servant returns from the field when, after pausing from the work of preaching for a time, the teacher returns to his conscience, and, retreating from public speaking to the court of his heart, privately reviews his acts or words with himself. To whom the Lord does not immediately say, "Come along, sit down," that is, "pass from this mortal life, and be refreshed in the blessed abode of eternal life." For He will say this later, but in the meantime, after the shepherding and farming, He orders him to prepare what he may eat at home, that is, to display the labor of open speech, as well as the humility of self-reflection. For the Lord deigns to enter such a temple of conscience and desires to partake most willingly of such a meal. For behold, He says, I stand at the door and knock, if anyone hears my voice and opens the door, I will come in to him and dine with him, and he with me (Apoc. III).
Which of you, having a servant plowing or tending sheep. This parable teaches that faith, the more excellent it is outwardly in virtues, should become all the more humble within in conscience. For a servant plowing or tending sheep is understood as any teacher of the Church. About whom the Lord said: No one who puts his hand to the plow and looks back is fit for the kingdom of God. And to another who testified his love for Him, He responded for the third time: Feed my sheep.
Luke 17:8 · 2 passages

And will not rather say unto him, Make ready wherewith I may sup, and gird thyself, and serve me, till I have eaten and drunken; and afterward thou shalt eat and drink?

And gird yourself and serve me while I eat and drink. To gird oneself is to restrict one's humble mind from all wandering thoughts by which the steps of duties are usually impeded. For whoever girds their clothes does this to avoid being entangled to the point of stumbling while walking. To serve God is to confess that one is insignificant in everything and has no strength without His grace. For a minister takes his name from a lower status, that is, subjection, just as a master takes his name from a higher status. Therefore, he serves the Creator who, considering his nature, fearing His judgements, humbles himself regarding his own virtues.
And after this, you will eat and drink. After, he says, I have been delighted by the work of your preaching, and refreshed by the feasts of your compunction, then finally you will pass and recline, and you will be refreshed forever with the eternal feasts of my wisdom.
Luke 17:9

Doth he thank that servant because he did the things that were commanded him? I trow not.

Does he give thanks to that servant because he did what was commanded of him? I think not. So also you, when you have done all things that are commanded you, say: We are unprofitable servants. If a man, he says, demands not uniform but multiple service from a human servant, and yet does not give him thanks, how much more you, who can do nothing without me? You ought not to measure the merits of labors by the length of time, but by love and voluntary service, always increasing the former by new endeavors. Therefore say: We are unprofitable servants. Indeed, servants, because you were bought at a price. Truly unprofitable, because the Lord does not need your goods. If, however, he is unprofitable who has done all things, what is to be said about him who either could not accomplish what was commanded due to weakness, or, what is worse, despised it out of pride? Otherwise: We are unprofitable servants, because the sufferings of this present time are not worthy to be compared with the glory that shall be revealed in us (Romans 8). And elsewhere: Who crowns me with mercy and compassion (Ps…
Does he give thanks to that servant because he did what was commanded of him? I think not. So also you, when you have done all things that are commanded you, say: We are unprofitable servants. If a man, he says, demands not uniform but multiple service from a human servant, and yet does not give him thanks, how much more you, who can do nothing without me? You ought not to measure the merits of labors by the length of time, but by love and voluntary service, always increasing the former by new endeavors. Therefore say: We are unprofitable servants. Indeed, servants, because you were bought at a price. Truly unprofitable, because the Lord does not need your goods. If, however, he is unprofitable who has done all things, what is to be said about him who either could not accomplish what was commanded due to weakness, or, what is worse, despised it out of pride? Otherwise: We are unprofitable servants, because the sufferings of this present time are not worthy to be compared with the glory that shall be revealed in us (Romans 8). And elsewhere: Who crowns me with mercy and compassion (Psalm 103). He does not say with merits and works, because by whose mercy we are prevented, that we may humbly serve God, by his gift we are crowned, that we may reign loftily with him.
Luke 17:10

So likewise ye, when ye shall have done all those things which are commanded you, say, We are unprofitable servants: we have done that which was our duty to do.

What we ought to have done, we have done. Indeed we ought to have, because he who did not come to be served, but to serve (Matt. 20), made us debtors to himself, so that, evidently not trusting in our own works, but always fearing his judgment, we may say with the prophet: What shall we render to the Lord for all that he has rendered to us? (Psalm 115). In order to show that he had faith like a mustard seed, humble and fervent, he prefaced, saying: I believed, therefore I have spoken, but I was greatly humbled (Psalm 116). To show that he did not trust in his own strength, he added, speaking in ecstasy: Every man is a liar (Psalm 116), to signify himself as an unworthy servant even after receiving the precious chalice of death, he exclaimed: O Lord, I am your servant, I am your servant, and the son of your handmaid, you have loosed my bonds (Psalm 116). He did not say, I have loosed them myself, I am sufficient to save myself, but You have loosed my bonds, I will offer to you the sacrifice of thanksgiving (Psalm 116). This then is the only perfection of faith in men, if, having fulfi…
What we ought to have done, we have done. Indeed we ought to have, because he who did not come to be served, but to serve (Matt. 20), made us debtors to himself, so that, evidently not trusting in our own works, but always fearing his judgment, we may say with the prophet: What shall we render to the Lord for all that he has rendered to us? (Psalm 115). In order to show that he had faith like a mustard seed, humble and fervent, he prefaced, saying: I believed, therefore I have spoken, but I was greatly humbled (Psalm 116). To show that he did not trust in his own strength, he added, speaking in ecstasy: Every man is a liar (Psalm 116), to signify himself as an unworthy servant even after receiving the precious chalice of death, he exclaimed: O Lord, I am your servant, I am your servant, and the son of your handmaid, you have loosed my bonds (Psalm 116). He did not say, I have loosed them myself, I am sufficient to save myself, but You have loosed my bonds, I will offer to you the sacrifice of thanksgiving (Psalm 116). This then is the only perfection of faith in men, if, having fulfilled everything that has been commanded, they know themselves to be imperfect, and as long as they wander away from the Lord, always acknowledge the evils in themselves to lament, always remember the good that is missing that, with his grace aiding, they may progress.
Luke 17:11-19

And it came to pass, as he went to Jerusalem, that he passed through the midst of Samaria and Galilee.

He fell upon his face, because he blushes with shame when he remembers the evils he had committed. And he is commanded to rise and walk, because he who, knowing his own weakness, lies lowly on the ground, is led to advance by the consolation of the divine word to mighty deeds. But if faith made him whole, who hurried himself back to give thanks, therefore does unbelief destroy those who have neglected to give glory to God for mercies received. Wherefore that we ought to increase our faith by humility, as it is declared in the former parable, so in this is it exemplified in the actions themselves.
Luke 17:12

And as he entered into a certain village, there met him ten men that were lepers, which stood afar off:

And it came to be, etc., ten leprous men met him. Leprous men can not unreasonably be understood as those who, not having the knowledge of true faith, profess various doctrines of error. For they do not hide their ignorance, but present it as supreme expertise to the light and display the boasting of their speech. And indeed there is no false doctrine which does not mix some truths among the false things. Hence true things mixed irregularly with false ones, appearing in one argument or narration of a man, as in the color of one body, signify leprosy, diversifying and staining human bodies with places of true and false colors. These therefore are to be avoided by the Church, so that if possible, being far removed, they may invoke Christ with a loud voice. Wherefore it is aptly added:
Luke 17:13

And they lifted up their voices, and said, Jesus, Master, have mercy on us.

Those who stood afar off, and lifted up their voice, saying: Jesus, Master, have mercy on us. And well, that they may be saved, they call Jesus Master. For indeed, in his words, they show they have erred, calling him the humble teacher of salvation, and when they return to the knowledge of the teacher, they immediately recur to the form of salvation. For it follows:
Luke 17:14

And when he saw them, he said unto them, Go shew yourselves unto the priests. And it came to pass, that, as they went, they were cleansed.

When he saw them, he said: Go, show yourselves to the priests. And it happened as they went, they were cleansed. The Lord is found to have sent none of those to whom he granted these corporal benefits to the priests, except lepers, because evidently, the priesthood of the Jews was a figure of the future royal priesthood, which is in the Church, whereby all belonging to the body of Christ, the highest and true Prince of priests, are consecrated. And whoever has lacked the grace of the Lord, either by heretical depravity, gentile superstition, Jewish perfidy, or even fraternal schism, must come to the Church and show the true color of faith they have received. But other vices, like the health and as it were the senses and limbs of the soul, the Lord heals and corrects within through conscience and understanding. Indeed, Paul also, having heard the voice of the Lord: Why do you persecute me? and, I am Jesus whom you are persecuting (Acts 9), was nevertheless sent to Ananias, so that through that priesthood established in the Church, he might receive the sacrament of the doctrine of fait…
When he saw them, he said: Go, show yourselves to the priests. And it happened as they went, they were cleansed. The Lord is found to have sent none of those to whom he granted these corporal benefits to the priests, except lepers, because evidently, the priesthood of the Jews was a figure of the future royal priesthood, which is in the Church, whereby all belonging to the body of Christ, the highest and true Prince of priests, are consecrated. And whoever has lacked the grace of the Lord, either by heretical depravity, gentile superstition, Jewish perfidy, or even fraternal schism, must come to the Church and show the true color of faith they have received. But other vices, like the health and as it were the senses and limbs of the soul, the Lord heals and corrects within through conscience and understanding. Indeed, Paul also, having heard the voice of the Lord: Why do you persecute me? and, I am Jesus whom you are persecuting (Acts 9), was nevertheless sent to Ananias, so that through that priesthood established in the Church, he might receive the sacrament of the doctrine of faith, and be approved in its true color. Not because the Lord cannot do all things by himself (for who else does these things even in the Church?) but so that the very society of gathered faithful, by approving and communicating the doctrine of true faith among each other, might impart in all that is said in words or signified in sacraments, as it were, one form of true color. Cornelius also, although his alms and prayers were accepted and heard by the angel, is nevertheless commanded to send for Peter, for the unity of doctrine and sacraments, as if to him and his it was said: Go, show yourselves to the priests; for as they went, they were cleansed. For Peter had already come to them, but they had not yet received the sacrament of baptism, had not yet spiritually come to the priests, and yet by the infusion of the Holy Spirit and the wonder of tongues, their cleansing was declared.
Luke 17:15

And one of them, when he saw that he was healed, turned back, and with a loud voice glorified God,

One of them, etc. This one, who returned glorifying God, signifies the devoted humility of the one Church to Christ. Who, well falling at the feet of the Lord, gave thanks. For he truly gives thanks to God, who, by repressing the thoughts of his own presumption, humbly sees how weak he is in himself, who attributes no virtue to himself, who acknowledges that the good deeds he performs come from the mercy of the Creator. Hence it is rightly added:
Luke 17:16

And fell down on his face at his feet, giving him thanks: and he was a Samaritan.

And he was a Samaritan. Indeed, Samaritan is interpreted as custodian. By this name, that people who, by giving thanks to Him from whom they received, attributes everything they received, is most aptly signified, in a manner singing from the Psalm: My strength I will guard for You, because You, O God, are my protector; my God, His mercy will precede me (Psalm LVIII). He falls moreover on his face, because he blushes from the evils he remembers having committed. For there man falls where he is ashamed. Hence also Paul, as if saying to some lying on their face, said: What fruit then did you have in those things of which you are now ashamed (Rom. VI)? On the other hand, concerning the rider of the horse, that is, about him who is lifted up in the glory of this world, it is said: His rider shall fall backward (Gen. XLIX). And again concerning the persecutors of the Lord it is written: They went backward and fell to the ground (John XVIII). What is this, that the chosen fall on their face and the reprobate fall backward, except that everyone who falls backward falls where he undoubtedly d…
And he was a Samaritan. Indeed, Samaritan is interpreted as custodian. By this name, that people who, by giving thanks to Him from whom they received, attributes everything they received, is most aptly signified, in a manner singing from the Psalm: My strength I will guard for You, because You, O God, are my protector; my God, His mercy will precede me (Psalm LVIII). He falls moreover on his face, because he blushes from the evils he remembers having committed. For there man falls where he is ashamed. Hence also Paul, as if saying to some lying on their face, said: What fruit then did you have in those things of which you are now ashamed (Rom. VI)? On the other hand, concerning the rider of the horse, that is, about him who is lifted up in the glory of this world, it is said: His rider shall fall backward (Gen. XLIX). And again concerning the persecutors of the Lord it is written: They went backward and fell to the ground (John XVIII). What is this, that the chosen fall on their face and the reprobate fall backward, except that everyone who falls backward falls where he undoubtedly does not see; but he who falls forward falls where he sees? Therefore, the wicked, because they fall into things unseen, are said to fall backward, because they collapse where they cannot currently see what follows them. But the just, because they willingly cast themselves down in these visible things in order to be raised in the invisible, as if they fall on their face, because pierced by fear while seeing, they are humbled.
Luke 17:17

And Jesus answering said, Were there not ten cleansed? but where are the nine?

But Jesus answered and said: Were there not ten cleansed? But where are the nine? If one is added to nine, a certain image of unity is completed. It results in such an embrace that the number does not advance further unless it returns again to one, so that this rule through the infinity of numbers is preserved. Therefore, the nine need one, so that they may be unified into a certain form of unity and become ten. But one does not need them to preserve unity. Therefore, as that one who gave thanks is approved and praised as a sign of the unique Church, so those nine who did not give thanks were made reprobate, excluded from the fellowship of unity. Hence, such will remain in the number of nine as imperfect. And rightly does the Savior inquire as if unknown, Where are they? For to know God is to choose; to not know is to reprobate.
Luke 17:18

There are not found that returned to give glory to God, save this stranger.

There was no one found to return and give glory to God except this foreigner. According to the body, indeed, it is easy to see a man who does not have leprosy and yet is not of good spirit; but according to the significance of this miracle, it troubles the observer to consider how the world can be ungrateful. But now it is also easy to see that it may happen that anyone in the society of the Church acquires sound and true doctrine and argues everything according to the rule of the Catholic faith, distinguishes the creature from the Creator, and is thus revealed to have been free from the diversity of lies like leprosy, and yet is ungrateful to God and his purifying Lord, because, elevated by pride, he is not humbled by holy thanksgiving, and thus becomes like those of whom the Apostle says: Although they knew God, they did not glorify him as God or give thanks. For by saying they knew God, he shows they had been cleansed from leprosy, but nevertheless immediately accuses them of being ungrateful.
Luke 17:19

And he said unto him, Arise, go thy way: thy faith hath made thee whole.

And he said to him: "Rise, go; your faith has made you well." He who devoutly fell before the Lord is commanded to rise and go, because he who, subtly recognizing his infirmity, humbly lies down, is ordered to rise through the consolation of the divine word to strong deeds, and with increasing merits daily to advance to more perfect things everywhere. But if faith made him well who bent down to give thanks to his Savior and cleanser, then disbelief destroyed those who neglected to give glory to God for received benefits. Therefore, this reading is linked with the previous one by that reason, that there it is determined through the given parable that faith ought to be increased by humility, but here it is more clearly shown by actual events, not only that faith recognized the rationale, but that the executed operation of faith is what makes the believer well and gives glory to the Father who is in heaven.

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