Dates: c. 339–397 AD (Ambrose, bishop of Milan from 374, the foremost Latin churchman of his
generation and the teacher who catechized and baptized Augustine at Easter 387;
the citations below come from works spanning his episcopate — On the Death of Satyrus [c. 378], the
Exposition of the Christian Faith [De Fide, c. 378–380], On the Holy Spirit [381],
Concerning Repentance, Concerning Virginity, and On the Duties of the Clergy [c. 388]) ·
Wikipedia
Verdict on the deuterocanon: YES — cites it as "Scripture" and "it is written"; leaves no canon-list.
Ambrose draws up no catalogue of the Old Testament books, so he renders no formal canon-verdict. But across his
works he quotes the disputed books exactly as he quotes Moses, the Psalms, and the Gospel: the Wisdom of Solomon
as what "Scripture says," Baruch as the very word of "the Lord," the Greek Susanna under "it
is written," and Sirach wielded as a scriptural rebuke of Arius — with Tobit, Judith,
and the Maccabean martyrs adduced beside the protocanon as patterns of holiness. His practice puts the weightiest Latin
witness of the fourth century on the "using" side of the divide, beside his fellow Westerners
Tertullian, Cyprian, and
Lactantius — and it stands in the direct line that runs from his pupil
Augustine to the African councils that would
enshrine the longer canon.
Preaching at the funeral of his brother in On the Death of Satyrus (I.30), Ambrose consoles himself that Satyrus died at an opportune hour, spared the barbarian invasions to come — just as Enoch was "translated" from a corrupt world. He grounds the consolation in a verse of the deuterocanonical Wisdom of Solomon (4:11), introduced by the bare label he reserves for the protocanon:1
For if no one mourns for Enoch, who was translated when the world was at peace and wars were not raging, but the people rather congratulated him, as Scripture says concerning him: "He was taken away, lest that wickedness should alter his understanding."
This is the firmest kind of "using" witness: the disputed book is not merely woven in but expressly named "Scripture" and adduced as the word that interprets a death — the same formula Ambrose gives Genesis or the Psalms.
In the first book of Concerning Repentance (I.9.43), expounding God's readiness to forgive the penitent, Ambrose puts a passage of the deuterocanonical Baruch (5:1) directly into the mouth of "the Lord," as His own answer to repentant Jerusalem:2
And the Lord bids them lay aside the garments of mourning, and to cease the groanings of repentance, saying: "Put off, O Jerusalem, the garment of your mourning and affliction, and clothe yourself in beauty, the glory which God has given you forever."
Baruch was reckoned in the Greek and Latin tradition an appendix to Jeremiah, and Ambrose cites it as the direct speech of God — the same prophetic standing Irenaeus, Hippolytus, and Basil gave the book.
In On the Holy Spirit (III.6.39), arguing that God hears the prayer of the chaste and the wronged, Ambrose tells the story of Susanna — the Greek addition to Daniel (ch. 13) — and clinches it with the citation-formula he uses for canonical narrative:3
For when Susanna, assailed by the conspiracy of the elders, saw that the mind of the people was moved by consideration for the old men, and destitute of all help, alone among men, conscious of her chastity she prayed God to judge; it is written: "The Lord heard her voice, when she was being led to be put to death."
The "it is written" attaches to the Greek-only Susanna narrative the very label later Fathers like Jerome would deny it — Jerome ranking Susanna among the parts of Daniel "not in the Hebrew." Ambrose treats it as written Scripture without qualification.
The use is not merely edifying but doctrinal. In the fifth book of the Exposition of the Christian Faith (De Fide V.19.236), pressing the Arians on the unsearchable generation of the Son, Ambrose turns a verse of the deuterocanonical Sirach (3:22) into a scriptural rebuke aimed at the heresiarch by name:4
But Arius is not the Holy Spirit. Nay, it was said even to Arius and to all men: "Seek not that which is too deep for you."
The verse carries probative weight in a controversy over the deity of Christ — the word of Sirach set against a heretic as binding revelation, exactly as Alexander of Alexandria had chained Sirach 3:21 into his own case against Arius a generation earlier.
Three softer uses adduce deuterocanonical figures as moral examples, braided into chains with protocanonical ones. In the Exposition of the Christian Faith (V.7.94), arguing that to be sent implies no inferiority in the one sent — his point about the Holy Spirit — Ambrose cites Tobit (9:3) beside Numbers 22:5
For Tobias sent Raphael the archangel, and an angel was sent to Balaam.
In Concerning Virginity (II.4.24), arguing that an act done for religion's sake is not defiled by its appearance, he sets Judith beside Rahab:6
And Judith adorned herself that she might please an adulterer, but because she did this for religion and not for love, no one considered her an adulteress.
And in On the Duties of the Clergy (I.41.212), cataloguing the church's martyrs, he holds up the mother of the seven sons from 2 Maccabees (7:20) — set, in the next breath, beside "those two-year-old children of Bethlehem" (Matthew 2:16):7
What shall I say of the mother who with joy looked on the corpses of her children as so many trophies, and found delight in the voices of her dying sons, as though in the songs of singers, noting in her children the tones of the glorious harp of her own heart, and a sweeter harmony of love than any strain of the lute could give?
These are historical-example uses rather than Scripture-formula citations, like Clement of Rome's "blessed Judith" — but they show the deuterocanonical narratives living in Ambrose's pastoral imagination as sacred history, set without seam beside Numbers, Joshua, and the Gospel.
One of Ambrose's citations cuts the other way, and is the more revealing for it. In On the Holy Spirit (II.6.49), answering Arians who pressed a verse of Amos to make the Holy Spirit a creature, Ambrose grants that a spirit — the wind, the spirit of the firmament — is indeed created, and grounds the point on the authority of "Esdras," citing a numbered book of Esdras as instruction:8
Esdras taught us that spirit is created, saying in the fourth book: "And upon the second day Thou madest the spirit of the firmament."
The verse is 4 Ezra 6:41 (the Latin 4 Esdras, the Apocalypse of Ezra; = 2 Esdras 6:41 in the King James Apocrypha) — and Ambrose adduces it the way he adduces a prophet: "Esdras taught us," a named book cited to settle a point in a doctrinal dispute. He was, in fact, among the firmest patristic users of this apocalyptic Esdras, quoting it elsewhere too (in On the Death of Satyrus he draws on the same book). Two things complicate any tidy account. First, the book's number is itself unstable: the de Romestin English here reads "the fourth book," but the critical Latin (CSEL) reads in tertio libro — "in the third book" — the translator having quietly conformed Ambrose's figure to the later Vulgate's "4 Esdras." The same 6:41 verse is cited as the "third" book by Ambrose and the "fourth" by his modern translator: a small, exact instance of the Esdras-numbering muddle that runs through the whole Latin tradition (and that bears on how Jerome counted his own four "books of Ezra"). Second, and more pointedly: 4 Ezra is in neither the Protestant nor the Tridentine canon — Trent (1546) excluded it, and it survives only in an appendix to the Clementine Vulgate. So the weightiest Latin churchman of the age was citing as a teaching authority an "Old Testament" book that neither later list would keep. The datapoint is genuinely two-edged: it confirms that the pre-Trent Latin West read disputed books as Scripture, while showing that its working "Old Testament" was broader and fuzzier than either the Reformation's canon or Trent's — not a clean witness to "the West always held exactly the Trent list."
Ambrose of Milan, On the Death of Satyrus, Book I, §30 (Nicene and Post-Nicene Fathers, ser. 2, vol. 10): "as Scripture says concerning him: 'He was taken away, lest that wickedness should alter his understanding'" — the deuterocanonical Wisdom of Solomon 4:11, named "Scripture" and set beside the translation of Enoch. ↩
Ambrose of Milan, Concerning Repentance, Book I, ch. 9, §43 (NPNF ser. 2, vol. 10): "And the Lord bids them lay aside the garments of mourning… saying: 'Put off, O Jerusalem, the garment of your mourning and affliction, and clothe yourself in beauty, the glory which God has given you forever'" — the deuterocanonical Baruch 5:1, put into the mouth of the Lord Himself. ↩
Ambrose of Milan, On the Holy Spirit, Book III, ch. 6, §39 (NPNF ser. 2, vol. 10): of Susanna, "it is written: 'The Lord heard her voice, when she was being led to be put to death'" — the Greek addition to Daniel (Susanna / Daniel 13:44), cited under the formula "it is written." ↩
Ambrose of Milan, Exposition of the Christian Faith (De Fide), Book V, ch. 19, §236 (NPNF ser. 2, vol. 10): "But Arius is not the Holy Spirit. Nay, it was said even to Arius and to all men: 'Seek not that which is too deep for you'" — the deuterocanonical Sirach (Ecclesiasticus 3:22), wielded as a scriptural rebuke of the heresiarch. ↩
Ambrose of Milan, Exposition of the Christian Faith (De Fide), Book V, ch. 7, §94 (NPNF ser. 2, vol. 10): "For Tobias sent Raphael the archangel" (Tobit 9:3), set beside the angel sent to Balaam (Numbers 22), to argue that to be sent denotes no inferiority in the one sent. ↩
Ambrose of Milan, Concerning Virginity, Book II, ch. 4, §24 (NPNF ser. 2, vol. 10): "And Judith adorned herself that she might please an adulterer, but because she did this for religion and not for love, no one considered her an adulteress" (Judith 10), set beside Rahab (Joshua 2) as a saintly example. ↩
Ambrose of Milan, On the Duties of the Clergy, Book I, ch. 41, §212 (NPNF ser. 2, vol. 10): "What shall I say of the mother who with joy looked on the corpses of her children as so many trophies, and found delight in the voices of her dying sons" — the mother of the seven sons of 2 Maccabees 7:20 — set in the next section (§213) beside "those two-year-old children of Bethlehem" (Matthew 2:16). ↩
Ambrose of Milan, On the Holy Spirit, Book II, ch. 6, §49 (NPNF ser. 2, vol. 10): "Esdras taught us that spirit is created, saying in the fourth book: 'And upon the second day Thou madest the spirit of the firmament'" — 4 Ezra 6:41 (Latin 4 Esdras / King James 2 Esdras 6:41), a book Trent (1546) did not canonize. The de Romestin translation reads "the fourth book," but the critical Latin text reads in tertio libro, "in the third book": "Quia creatur spiritus Hesdras nos docuit, dicens in tertio libro: Et in die secundo iterum creasti spiritum firmamenti" (CSEL 79, ed. O. Faller). On the wider muddle of how the Latin Fathers numbered the "books of Ezra" — and Bogaert's reconstruction of Jerome's count — see Pierre-Maurice Bogaert, "The Latin Canon," in Textual History of the Bible, vol. 2 (Brill, 2020), who adduces this very Ambrose citation; the Latin and Ambrose's standing as the firmest patristic user of 4 Ezra are noted in F. J. García Martínez, "La autoridad de 4 Esdras y el descubrimiento de América". ↩