Type: supporting argument (off-timeline) · Assessment: weak. At 1 Corinthians 2:9 Paul introduces "Eye hath not seen, nor ear heard…" with the citation formula kathôs gégraptai ("as it is written"), yet the words match no exact Old-Testament text. That much is sound and undisputed. But the interpretation the verse is pressed to serve — that Paul here quotes, as Scripture, a non-canonical writing (the lost Apocalypse/Secrets of Elijah) and so treated his Bible as open past the Hebrew canon — is weak: the most learned Hebrew scholar on the timeline, Jerome, identified the source as a free paraphrase of Isaiah 64:4 and dismissed the apocryphal ascription as "the ravings of the apocryphal books"; the extant Apocalypse of Elijah is a late Coptic Christian work that postdates Paul and does not contain the phrase, so the borrowing, if any, runs the other way · back to timeline · Related arguments: New-Testament quotations with no Old-Testament source — see also the centerpiece Ephesians 5:14, John 7:38, and Luke 11:49. The patristic witnesses are Origen and Ambrosiaster (apocryphon) against Jerome (Isaiah)
Here the sub-claim is that 1 Corinthians 2:9, citing "Scripture" words found in no Old-Testament book, shows the apostles quoting a non-canonical writing as Scripture.
"But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him."
— 1 Corinthians 2:9 (KJV). The formula kathôs gégraptai ("as it is written") is the standard New-Testament header for an Old-Testament citation; yet no canonical passage reads exactly this way. This is the firmest member of the cluster of New-Testament "strange quotations" for the wider-canon reading, because here — unlike the centerpiece at Ephesians 5:14 — a named Father actually pins the words to a specific apocryphal book. The argument: since Paul cites with a Scripture-formula words drawn (so Origen says) from the Apocalypse of Elijah, the apostolic category of "Scripture" reached beyond a closed Hebrew canon.1
Origen named the apocryphon — and Ambrosiaster after him. In his Commentary on Matthew (the old-Latin Commentariorum Series 117) Origen writes that the words "are found in no canonical book, except in the Secrets of Elijah the prophet" (in nullo regulari libro hoc positum invenitur, nisi in Secretis Eliae prophetae). Ambrosiaster, commenting on the same verse, makes the connection double-edged: "These words were expressed somewhat differently by Isaiah, and they are also found in the apocryphal Apocalypse of Elijah." So even the witness most often cited for the apocryphal source already couples it with Isaiah — the very text Jerome would make the whole answer.2
Jerome flatly rejected the apocryphon and assigned the verse to Isaiah. Writing to Pammachius on the art of translation, Jerome takes up this very passage as a case of the apostles paraphrasing rather than quoting word-for-word:
"Let us pass on now to the apostle Paul who writes thus to the Corinthians… 'as it is written, Eye hath not seen nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love Him.' Some writers on this passage betake themselves to the ravings of the apocryphal books and assert that the quotation comes from the Revelation of Elijah; whereas the truth is that it is found in Isaiah according to the Hebrew text… We see then from what place the quotation is taken and yet the apostle has not rendered his original word for word, but, using a paraphrase, he has given the sense in different terms."
Jerome quotes the Hebrew of Isaiah 64:4 — "Since the beginning of the world men have not heard nor perceived by the ear, neither hath the eye seen, O God, beside thee what thou hast prepared for them that wait for thee" — and slots Paul's words into his long list of apostolic citations that give "the meaning rather than the words." The great champion of the Hebrew canon thus locates the citation squarely inside the canon. He makes the same placement in his Preface to the Pentateuch, where he files these very words among the Evangelists' and Apostles' citations "from the Old Testament" — Scripture to be sought in the Hebrew, not in an apocryphon.3
Others quoted it as a settled saying, tied to Isaiah's hope. Tertullian folds the words into a chain of Isaiah promises about "the good of the land" awaiting the renewed flesh, treating them as a known scriptural expectation rather than a riddle of provenance; the Apostolic Constitutions likewise quote them as the eschatological inheritance "which eye has not seen… such things as God has prepared for them that love Him," with no apocryphal attribution. The verse circulated as Scripture's promise of glory, not as a flag for a lost book.4
What holds. The bare datum is real and should be conceded: Paul writes kathôs gégraptai and the words that follow are not a verbatim Old-Testament text. As with the whole cluster, apostolic citation-practice was looser than a later, formally closed canon — Paul paraphrases, conflates, and renders from the Greek and the Hebrew freely.
What is overstated. The leap from "no verbatim Old-Testament match" to "Paul quoted a non-canonical writing as Scripture" fails at three joints.
There is a perfectly good canonical source. Isaiah 64:4 (with 65:17, "the things which God hath prepared") supplies the sense, the vocabulary, and the structure; the differences are exactly the paraphrastic freedom Jerome documents across a dozen apostolic citations in the same letter. On the reading of the one Father who actually read the Hebrew, the citation never leaves the canon — and modern commentary largely follows him, treating 1 Corinthians 2:9 as a free rendering of Isaiah (possibly mediated through a liturgical or testimonia form), not a quotation of an apocryphon.
The apocryphal anchor is divided and probably backwards. The patristic evidence does not line up behind the Apocalypse of Elijah: Origen affirms it, Ambrosiaster couples it with Isaiah, and Jerome denies it outright as "ravings." Worse, the surviving Apocalypse of Elijah is a late Coptic Christian recension (c. 150–300, postdating Paul) that does not contain the phrase Origen ascribes to it. So the extant book cannot be Paul's source; if there is any literary contact, the later apocryphon absorbed Paul's famous words, not the reverse — which would invert the argument. The most one can responsibly say is that a lost Jewish saying may stand behind both.
A formula marks a quotation, not a canon-verdict. Even granting (against Jerome) that Paul leaned on an extra-canonical saying, citing it would no more canonize it than Jude's naming 1 Enoch as prophecy (Jude 14–15) canonizes Enoch, or Paul's quoting Aratus, Epimenides, and Menander canonizes the pagan poets. "Introduced with gégraptai" is a weaker claim than "received as canonical Scripture," which is what the wider-canon thesis needs.
What survives. A modest residue: the apostolic notion of "Scripture" had softer outer edges than a closed list, and Paul cites freely enough that an exact source is sometimes hard to fix. But for this verse the best-attested source is canonical — Isaiah 64:4, on Jerome's reading — and the apocryphal alternative is contested, late, and likely the borrower. As a proof of a wider apostolic canon, 1 Corinthians 2:9 does not hold.
Weak. That Paul introduces with "as it is written" words found in no verbatim Old-Testament text is sound; the inference that he thereby quotes a non-canonical writing as Scripture is weak on its best case. The firmest patristic anchor for that reading — Origen's (and Ambrosiaster's) ascription to the Apocalypse/Secrets of Elijah — is contradicted by Jerome, who read the Hebrew and assigned the words to a paraphrase of Isaiah 64:4, and rests on a surviving apocryphon that postdates Paul and lacks the phrase, so the borrowing more likely runs from Paul to the later book. A canonical source (Isaiah) is available and probably correct; a citation formula does not canonize what it cites. The verse shows the looseness of apostolic quotation, not a wider canon. (The companion centerpiece Ephesians 5:14 is rated contested because there the soft-boundary point carries more weight; here a strong canonical source pulls the specific verse down to weak.)
The verse and formula: 1 Corinthians 2:9 (KJV), "as it is written" (kathôs gégraptai). The cluster of New-Testament citations with no exact Old-Testament source is surveyed by Edmon Gallagher, "Epiphanius on Ephesians 5:14" (2017), and in his Hebrew Scripture in Patristic Biblical Theory: Canon, Language, Text (Supplements to Vigiliae Christianae 114; Leiden: Brill, 2012); the centerpiece is weighed at Ephesians 5:14. (The same verse appears elsewhere on this timeline in a different connection — Alexander of Alexandria chains it with Sirach as scriptural testimony, a question of Sirach's standing, not of an apocryphal source.) ↩
Origen, Commentary on Matthew, Commentariorum Series 117, on 1 Corinthians 2:9: "in nullo regulari libro hoc positum invenitur, nisi in Secretis Eliae prophetae" — the words are in no canonical book except "the Secrets of Elijah the prophet." Ambrosiaster, Commentary on 1 Corinthians 2:9: "These words were expressed somewhat differently by Isaiah, and they are also found in the apocryphal Apocalypse of Elijah" (text in Ambrosiaster, Commentaries on Romans and 1–2 Corinthians, trans. Gerald L. Bray, Ancient Christian Texts; Downers Grove: IVP Academic, 2009, on 2:9). On Origen's attribution see Joseph Verheyden, "Origen on the Origin of 1 Cor 2,9," in R. Bieringer (ed.), The Corinthian Correspondence (BETL 125; Leuven: Leuven University Press, 1996), 491–511, and the summary at "Apocalypse of Elijah," Wikipedia (citing O. S. Wintermute in Charlesworth, ed., The Old Testament Pseudepigrapha, vol. 1, 728–30). ↩
Jerome, Letter 57 (To Pammachius, on the best method of translating) §9: "Some writers on this passage betake themselves to the ravings of the apocryphal books and assert that the quotation comes from the Revelation of Elijah; whereas the truth is that it is found in Isaiah according to the Hebrew text… the apostle has not rendered his original word for word, but, using a paraphrase, he has given the sense in different terms." Jerome cites the Hebrew of Isaiah 64:4. He makes the same placement in his Preface to the Pentateuch (the Prologue to Genesis, c. 403, trans. Kevin P. Edgecomb), which lists "Things which no eye has seen, nor ear heard, nor has arisen in the heart of man, which God has prepared for those loving Him" among the New Testament's citations "from the Old Testament which are not found in [the Septuagint] books" but belong to the Hebrew Scriptures — grouping the verse with canonical Old-Testament testimony, not with any apocryphon. ↩
Tertullian, On the Resurrection of the Flesh 26, quoting "the things which neither eye hath seen, nor ear heard, and which have not entered into the heart of man" within a chain of Isaiah promises about "the good of the land"; Apostolic Constitutions 7.2.32, quoting the same words as the inheritance of the righteous, with no apocryphal attribution. ↩