Feria Quarta infra Hebdomadam XIII post Octavam Pentecostes ~ IV. classis Commemoratio: S. Zephyrini Papæ et Martyris Wednesday, 26 August 2026
I. The Epistle: Galatians 3:16–22
To Abraham were the promises made and to his seed. He saith not, And to his seeds, as of many: but as of one, And to thy seed, which is Christ. Now this I say, that the testament which was confirmed by God, the law which was made after four hundred and thirty years, doth not disannul, to make the promise of no effect. For if the inheritance be of the law, it is no more of promise. But God gave it to Abraham by promise. Why then was the law? It was set because of transgressions, until the seed should come, to whom he made the promise, being ordained by angels in the hand of a mediator. Now a mediator is not of one: but God is one. Was the law then against the promises of God? God forbid. For if there had been a law given which could give life, verily justice should have been by the law. But the scripture hath concluded all under sin, that the promise, by the faith of Jesus Christ, might be given to them that believe. (Gal 3:16–22, Douay-Rheims)
The Apostle is arguing chronology as theology. The promise to Abraham is older than the Law of Sinai by four hundred and thirty years, and a later covenant cannot annul an earlier one that God himself has ratified. The Law therefore was never the ground of the inheritance. It was, in Paul’s phrase, propter transgressiones posita — set in place because of transgressions — an interim ordinance, not a rival testament.
Three exegetical points anchor the passage, and the Fathers pressed all three.
First, the singular seed. Saint Jerome, commenting on this verse in his Commentarius in epistulam ad Galatas (Book II, on 3:16), observes that the Apostle deliberately fastens on the grammatical number of the Hebrew zera’ — a collective noun that nonetheless stands in the singular — and reads it as a prophecy of the one Christ in whom the many are gathered. Jerome is candid that Paul’s argument is not a philological proof but an apostolic reading of the text under the Spirit; what makes the reading true is not grammar but the fact of Christ.
Second, the Law ordained by angels in the hand of a mediator. Saint Augustine, in his Expositio epistulae ad Galatas (on 3:19–20), takes the mediator to be Moses, and the angels to be the ministers through whom the Law was delivered. The crucial line for Augustine is mediator autem unius non est: Deus autem unus est. A mediator stands between two parties; but where the promise is concerned, God acts alone, unilaterally, by his own oath, with no second party to satisfy. The Law is bilateral and conditional; the promise is unilateral and unconditional. That is why the Law cannot be the source of life.
Third, the scripture hath concluded all under sin. Saint John Chrysostom, in his Commentarius in epistulam ad Galatas (on 3:22, PG 61), reads conclusit as the language of a prison: the Law shut all men in together, Jew and Gentile alike, so that no one could claim exemption and every one would be driven to the single door of faith. Augustine develops the same thought in De spiritu et littera, where the letter of the Law reveals sin without curing it; the Law is a physician’s diagnosis that names the disease and cannot prescribe the remedy. The remedy is the promise, received by the faith of Jesus Christ.
The Law, then, is neither the enemy of the promise nor its equal. It is the promise’s servant — a paedagogus, as the verses that follow will say — whose whole office is to make the child feel his need of the Father’s gift.
II. The Gospel: Luke 17:11–19
And it came to pass, as he was going to Jerusalem, he passed through the midst of Samaria and Galilee. And as he entered into a certain town, there met him ten men that were lepers, who stood afar off; and lifted up their voice, saying: Jesus, master, have mercy on us. Whom when he saw, he said: Go, shew yourselves to the priests. And it came to pass, as they went, they were made clean. And one of them, when he saw that he was made clean, went back, with a loud voice glorifying God. And he fell on his face before his feet, giving thanks: and this was a Samaritan. And Jesus answering, said, Were not ten made clean? and where are the nine? There is no one found to return and give glory to God, but this stranger. And he said to him: Arise, go thy way; for thy faith hath made thee whole. (Luke 17:11–19, Douay-Rheims)
Everything in this narrative is governed by the Law of Leviticus. The lepers stand afar off because Leviticus 13 commands it. They are sent to the priests because Leviticus 14 requires priestly inspection before a cleansed leper may re-enter the camp. Our Lord, who has just been shown in the Epistle as the seed older than Sinai, nonetheless sends the ten to Sinai’s priests. He does not abolish the Law’s diagnostic office. And it is on the way — in the act of obeying — that they are cleansed.
But the healing is not the end of the story. Nine continue to the priests; one turns back. The Latin is exact: regressus est — he reversed direction. He had been sent toward the Levitical priesthood; he returns to the true Priest. He falls on his face, gratias agens — the participle is eucharistōn in the Greek — and Our Lord, who had cleansed all ten with a word, pronounces over this one alone the further sentence: fides tua te salvum fecit. Ten were made clean (mundati); one was made whole (salvus).
Saint Augustine’s exposition of this pericope, in the Quaestiones Evangeliorum (Book II, q. 40), is the reading the Roman Church placed in the Breviary for this very Sunday. He takes leprosy as a figure of false doctrine — the disease that disfigures the skin’s surface with patches of true and false colour mingled together, as heresy mingles truth with error. The ten are sent to the priests because it belongs to the Church’s priesthood to judge what is sound and what is not. The nine who do not return are those who, having received the truth, count it as their own achievement and feel no debt; the Samaritan — whose name, Augustine notes, means custos, guardian — is he who guards what he has received by referring it back to the Giver.
Saint Cyril of Alexandria, in his Homiliae in Lucam (Homily 113), sharpens the contrast between the nine and the one along the lines of Israel and the nations: the Jews who were healed in the Law did not return to the One who fulfilled it, while the foreigner, who had no share in Sinai, was found at the feet of Christ. Cyril does not soften this; he treats the ingratitude of the nine as a warning to any people who mistake the possession of privileges for the possession of grace.
The Venerable Bede, In Lucae Evangelium expositio (Book V, on 17:11–19), draws the two halves together. The command to go to the priests, he says, was given so that the lepers might obey in faith before they saw any result; the cleansing on the road shows that faith precedes sight. And the return of the one teaches that the completion of every gift is thanksgiving. Bede, following Augustine, does not deny that the nine were really cleansed; he denies that they were saved. The distinction between mundatio and salus is the whole burden of the Gospel.
III. The Liturgical Setting
This Wednesday is a feria of the fourth class within the Thirteenth Week after Pentecost. Under the 1962 rubrics the Mass of the preceding Sunday is resumed with its Epistle and Gospel, and the commemoration of Saint Zephyrinus is added at the Collect, Secret, and Postcommunion. The Church thus holds the Sunday’s teaching before us for a full week, and today she sets a martyred pope beside it.
Zephyrinus governed the Roman Church from roughly 199 to 217, succeeding Victor and preceding Callistus. The documentary witness to his pontificate is thin and, in one case, hostile. Eusebius, Historia ecclesiastica V.28, preserves an anonymous Roman treatise (often called the Little Labyrinth) describing the Adoptionist sect of Theodotus the Tanner, excommunicated under Victor, and the case of the confessor Natalius who was drawn into that sect and returned in tears to Zephyrinus, begging readmission. Eusebius also records (HE VI.14) that Origen came to Rome during this pontificate. Hippolytus, in the Refutatio omnium haeresium IX.7, treats Zephyrinus with open contempt — an uneducated man, he says, governed by Callistus — but Hippolytus writes as a rival and a schismatic, and his invective is itself evidence that the pope resisted the pressure of the learned faction to adopt a doctrine that would divide the Son from the Father. Tertullian’s Adversus Praxean (ch. 1) may refer to a Roman bishop of this period who was on the point of recognising the Montanist prophecies before being dissuaded; whether this is Victor or Zephyrinus is disputed. The Liber Pontificalis attributes to him disciplinary ordinances concerning the celebration of Mass and the ordination of clergy in the presence of the faithful; those attributions are late and cannot be pressed.
His burial in his own cemetery on the Via Appia, above the crypt that would take the name of his deacon Callistus, is well attested. His title of martyr, which the Roman Martyrology preserves, rests on the Church’s constant devotion rather than on any contemporary account of a violent death. That is traditio pia, and we hold it as such.
Why this pope on this day? The Roman Church in his time was contending with those who confessed a Christ who was mere man — a healed man, perhaps, an adopted man, but not the Word made flesh. Against Theodotus and his school stood the plain fact that from the beginning Christians had sung to Christ as to God. Zephyrinus’s Rome, whatever the pope’s personal learning, held that line. The Samaritan who fell on his face before his feet, glorifying God, made the same confession in gesture that Zephyrinus’s Church made in doctrine.
(The post-1969 calendar omits Saint Zephyrinus entirely; that omission is noted for orientation only and has no bearing on the 1962 observance.)
IV. Thomistic Synthesis
The Angelic Doctor’s reading of these two passages converges on a single structure, and the structure is that of exitus and reditus: all things proceed from God and are ordered to return to him, and the Law and the Gospel are the two stages of one return.
In the Summa Theologiae I-II, q. 98, Saint Thomas asks whether the Old Law was good, and answers that it was good because it was ordered to Christ — good as a means, imperfect as an end. In q. 100, a. 12, he asks whether the moral precepts of the Old Law justified, and answers that they did not, because justification is the effect of grace, and the Law of itself confers no grace; it shows what is to be done without giving the power to do it. This is precisely the Apostle’s si data esset lex quae posset vivificare, vere ex lege esset iustitia. In q. 106 and q. 107, comparing the Old Law with the New, Thomas locates the whole difference in this: the New Law is chiefly the grace of the Holy Ghost given through faith in Christ, and only secondarily a written code. The New Law is the promise arrived; the Old Law is the promise awaited.
In his Super epistulam ad Galatas lectura, chapter 3, Thomas treats the mediator text with characteristic care: a mediator is one who stands between, and the Law was given through Moses standing between God and a people; but the promise required no one to stand between, because God alone bound himself. Christ is indeed the one Mediator (1 Tim 2:5), but he is mediator as man, and the promise he fulfils was made by him as God — Deus autem unus est.
The leper narrative Thomas handles under two headings. In I-II, q. 102, a. 5, discussing the ceremonial precepts, he explains the Levitical laws of leprosy: their literal purpose was public health and the segregation of the unclean; their figurative purpose was to signify sin, which spreads by contact and must be judged by the priest. The priest of the Old Law could only declare the leper clean; he could not make him so. Our Lord sends the ten to the priests to honour the Law’s office of declaration while reserving to himself the work of cleansing. Then, in II-II, q. 106, Thomas treats gratitude as a part of justice — the virtue by which we render to a benefactor what is due for a favour received — and in q. 107 he treats ingratitude, ranking as its gravest form the failure to acknowledge the benefit at all. The nine did not deny that they were healed; they simply did not return. That silence is the ingratitude Thomas describes.
Set the two together and the synthesis is this. The Law concluded all under sin: it diagnosed, it segregated, it sent the leper to the priest. The Law could not give life: the Levitical priest could inspect, not heal. The healing came from the seed who was promised before the Law existed. And the healing is received by faith, which is completed in thanksgiving. Ten were mundati by the word of Christ; one was salvus by faith — and the difference between the ten and the one is the difference between the exitus of a gift and the reditus of the giver’s glory. Grace does not destroy the Law’s office; it perfects it (gratia non tollit naturam sed perficit). The Samaritan did not despise the priests; he simply knew which Priest had cleansed him.
V. Devotional Application
The Church calls the Sacrifice of the Mass by the very word this Gospel uses of the Samaritan: eucharistia, thanksgiving. Every Mass is the return of the one leper, multiplied through the whole Body. And every Mass is attended, unseen, by nine who were cleansed in Baptism and have gone on their way without turning back.
The nine were obedient. They did exactly what they were told. Their fault was not disobedience but the assumption that the gift, once received, was theirs to carry off. It is possible to be a faithful observer of the Law — to keep the fasts, to attend the Mass, to say the prayers — and never once to fall on one’s face and give thanks. The Law without the Promise is the nine walking to the priests. The Promise received in faith is the one walking back.
Saint Zephyrinus offers a second application. His Church confessed the divinity of the one before whom the Samaritan fell. That confession cost the pope the contempt of the learned; it may have cost him more. To glorify God with a loud voice in an age when clever men were proposing a merely human Christ is the martyr’s form of the leper’s gratitude.
A practical exercise for this week: at the end of each day, before the examination of conscience, name one benefit received that day and return thanks for it explicitly — not in general, but for that one thing. This is the return of the Samaritan reduced to its daily scale. The Sunday Collect gives the reason: we cannot attain what God promises unless we first love what he commands, and thanksgiving is the beginning of love.
VI. The Collect
Of the Sunday:
Omnípotens sempitérne Deus, da nobis fídei, spei et caritátis augméntum: et, ut mereámur ássequi quod promíttis, fac nos amáre quod prǽcipis. Per Dóminum nostrum…
Almighty and everlasting God, grant unto us an increase of faith, hope, and charity: and, that we may deserve to obtain what thou dost promise, make us to love what thou dost command. Through our Lord…
The Collect is the Epistle in the form of a prayer. Quod promittis is the promise made to Abraham; quod praecipis is the Law. The prayer does not ask to be freed from the commandment but to love it, because the Law loved is the Law fulfilled in charity, and charity is the increase of the theological virtues the Collect begs at the outset. Faith, hope, and charity are named in the order the Samaritan lived them: he believed and went; he hoped and was cleansed; he loved and returned.
Commemoration of Saint Zephyrinus (from the Common of Supreme Pontiffs, Si diligis me):
Gregem tuum, Pastor ætérne, placátus inténde: et, per beátum Zephyrínum Mártyrem tuum atque Summum Pontíficem, perpétua protectióne custódi; quem totíus Ecclésiæ præstitísti esse pastórem. Per Dóminum nostrum…
O eternal Shepherd, look favourably upon thy flock, and keep it under thy continual protection by the intercession of blessed Zephyrinus, thy Martyr and Supreme Pontiff, whom thou didst appoint to be shepherd of the whole Church. Through our Lord…
VII. Aspiration
Jesu, magister, miserere nostri — et fac nos regredi ad te, gratias agentes.
Jesus, master, have mercy on us — and make us turn back to thee, giving thanks.
VIII. For Further Study
- Saint Augustine, Expositio epistulae ad Galatas, on Gal 3:15–22 (CSEL 84); De spiritu et littera, chs. 5–9 (CSEL 60); Quaestiones Evangeliorum II.40 (CCSL 44B).
- Saint Jerome, Commentarius in epistulam ad Galatas, Book II (CCSL 77A).
- Saint John Chrysostom, Commentarius in epistulam ad Galatas, on ch. 3 (PG 61).
- Saint Cyril of Alexandria, Homiliae in Lucam, Hom. 113 (Syriac version, ed. Payne Smith).
- Venerable Bede, In Lucae Evangelium expositio, Book V (CCSL 120).
- Saint Thomas Aquinas, Summa Theologiae I-II, qq. 98, 100, 102, 106–107; II-II, qq. 106–107; Super epistulam ad Galatas lectura, cap. 3.
- Eusebius of Caesarea, Historia ecclesiastica V.28, VI.14 (SC 41).
- Hippolytus, Refutatio omnium haeresium IX.7, 11–12 (GCS).
- Tertullian, Adversus Praxean 1 (CCSL 2).
- Liber Pontificalis, ed. Duchesne, vol. I, s.v. Zephyrinus.
Readers following the Sacred Liturgy path will find this feria a natural entry into the theology of the Mass as eucharistia; those on the Church History path may take Saint Zephyrinus as a door into the early Roman struggle over Adoptionism and Monarchianism, and the still-earlier question of how a Church of modest learning held a line that its cleverest members were tempted to abandon.
IX. A Note on Sources
The scriptural text is given in the Douay-Rheims version. The patristic references above are given as paraphrase with locus rather than as direct quotation, pending verification against the critical editions cited. Saint Augustine’s Quaestiones Evangeliorum II.40 is identified as the Breviary homily for the Thirteenth Sunday after Pentecost on the strength of the received Roman lectionary; readers should confirm the assignment against a printed Breviarium Romanum. The historical portrait of Saint Zephyrinus rests on Eusebius, Hippolytus, and Tertullian, all of whom are cited with their limitations stated; his title of martyr is retained as traditio pia, on the authority of the Roman Martyrology, and is not here asserted as an established historical fact. The Collects are given as they stand in the received 1962 Missale Romanum and should be collated against a printed copy before liturgical or publication use.