Blindness as Ignorance

• Blindness is a standard figure for ignorance in Scripture — not a novelty imported into the text.
• The chapter itself names what they cannot see. The warning about false prophets (ψευδοπροφήτης, 7:15) supplies the content of the blindness; the same word stands in the parallel sermon at Luke 6:26.
• Jesus uses that exact language of the Pharisees — Matthew 15:14, τυφλοί εἰσιν ὁδηγοὶ τυφλῶν, “they are blind guides of the blind.”
• The picture is drawn from the hearers’ working world — timber, and a landscape that puts grit in a man’s eye.
• So the hypocrite is a pretender to knowledge. To judge what you do not truly know is to perform an expertise you do not have. The beam is the ignorance; removing it is what makes accurate judgment possible.

• Dictionary of Biblical Imagery (IVP) — “Blindness,” “Eye,” “Sight,” “Darkness” — the single most useful entry-point for this reading.
• Dictionary of Jesus and the Gospels (IVP) — “Blindness and Deafness,” “Hypocrisy,” “Pharisees,” “False Prophet.”
• NIDNTTE — τυφλός, ὁδηγός, ὑποκριτής, κατανοέω, γινώσκω, ἄγνοια.
• TDNT — τυφλός (Schrage) on blindness as a figure for religious incapacity in Judaism and the Gospels.

• W. D. Davies & Dale Allison, Matthew 1–7 (ICC); R. T. France (NICNT); John Nolland (NIGTC).
• Craig Keener, The Gospel of Matthew: A Socio-Rhetorical Commentary — strong on the social setting of reproof.
• Hans Dieter Betz, The Sermon on the Mount (Hermeneia).
• Ulrich Luz, Matthew 1–7 (Hermeneia) — the history of interpretation, including the ignorance readings.

The Dead Sea Scrolls use it for a period of not-knowing. The Damascus Document describes Israel before the Teacher: they “were like blind men, and like those who grope for the way, for twenty years” (CD 1:9–10). Blindness there is not a moral charge but an epistemic one — a community that did not yet know the way. That is the sense this reading needs, attested in Jesus’ own century.

The rabbis used the splinter-and-beam idiom for reproof. A saying attributed to Rabbi Tarfon (late 1st / early 2nd c.) complains that no one accepts correction: say “remove the splinter” and the answer is “remove the beam” (b. Arakhin 16b). Read carefully: the Talmud is a much later compilation, so this is not a source Jesus quoted — it shows the idiom was common stock. Note the difference, though: in the rabbinic form the fault lies with the one who refuses reproof; here it lies with the one who offers it.

The wider Greek world took ignorance and blindness as near-synonyms. The commonplace is old and everywhere — most famously Plato’s prisoners in the cave, who see shadows and take them for the world (Republic VII). A Greek-speaking congregation did not need the equation explained.

And reproof was regulated, not free. Leviticus 19:17 commands it; at Qumran it became procedure — reproof “in truth, humility and loving-kindness” and never in anger (1QS 5:24–6:1), with witnesses required before any charge (CD 9:2–8). The question in the air was never whether to correct, but who is competent to.

The verbs are the argument. Verse 3 does not say the man refuses to see his beam; it says he does not κατανοέω it — he does not register it, take note of it, bring it to mind. That is a verb of cognition. Set beside it the promise of v.5, διαβλέψεις, and the command of vv.16 and 20, ἐπιγνώσεσθε, and the paragraph is carried end to end by knowing-words.

The size gap says the same thing. A κάρφος is a dry twig or bit of chaff; a δοκός is a roof-joist. A man who can spot the first and miss the second is not described as wicked. He is described as unable to assess — and comically so. The absurdity is epistemic.

• Deuteronomy 16:18–20 — the appointment of judges, and the one thing that ruins them: τὰ γὰρ δῶρα ἐκτυφλοῖ ὀφθαλμοὺς σοφῶν, “bribes blind the eyes of the wise.” Blindness in an explicitly judicial setting — the nearest Torah analogue to Matthew 7:1–5.
• Leviticus 19:15–18 — the command Jesus is guarding: judge your neighbour ἐν δικαιοσύνῃ (v.15), reprove your ἀδελφός and bear no sin because of him (v.17). Torah requires the very thing 7:1 appears to forbid; that tension is what the blindness reading resolves.
• Isaiah 6:9–10 (quoted at length by Matthew at 13:14–15) — sight and understanding equated by the evangelist himself; Isaiah 42:18–19, the blind servant; Isaiah 56:10 LXX, the blinded watchmen who “do not know how to understand.”
• Matthew 15:14 and 23:16–26 — the blind guides, and the πρῶτον command to a blind Pharisee that matches the πρῶτον command to the hypocrite here.
• Luke 6:26, 39–42 — the parallel sermon, where ψευδοπροφήτης (v.26), the blind guide (v.39) and the speck and the log (vv.41–42) all stand in one discourse. Luke’s arrangement is the strongest external support this reading has: he welds blindness to the speck-and-log himself.
• Romans 2:1, 19 — Paul opens with the judging problem in Matthew’s own terms (“you have no excuse, O man, every one of you who judges”) and in the same argument names the fault: ὁδηγὸν εἶναι τυφλῶν, “a guide to the blind.” The earliest interpreter we have joins presumptuous judging to blind-guiding.
• Revelation 3:17 — Laodicea: “you say, I am rich… not realising that you are wretched, pitiable, poor, blind and naked.” The exact condition of the man in v.3: blind, and unaware of it. 2 Peter 1:9 and 1 John 2:11 carry the same figure.

• Davies & Allison, Matthew 1–7 (ICC) — the fullest treatment of vv.1–5 and of the notoriously disputed v.6.
• Ulrich Luz, Matthew 1–7 (Hermeneia) — traces the reception history, where the “blindness” line of reading has a long patristic pedigree.
• R. T. France (NICNT); John Nolland (NIGTC); Craig Keener; D. A. Carson, Matthew (EBC).
• W. Schrage, τυφλός, in TDNT — the standard lexical study of blindness as religious incapacity.
• Classic: Chrysostom, Homilies on Matthew 23; Augustine, On the Sermon on the Mount II.19 — who reads the beam as the fault that clouds judgment, close to this view.

• The majority reading is moral, not epistemic. Most modern commentaries take the beam as the critic’s own greater sin — hypocrisy in the ordinary English sense. This second view is a minority emphasis, and should be presented as one.
• It is not, however, novel. The patristic tradition frequently reads the beam as what obscures perception; the reading’s strength is that it takes the eye imagery seriously as imagery instead of treating it as decoration on a moral point.
• The two are not exclusive. The most defensible position is that Matthew’s hypocrite is the man whose outside and inside diverge, and that the divergence is moral in 6:2–18 and epistemic in 7:3–5. The metaphor chosen here — an eye — is what tips this passage toward knowledge.
• Verse 6 remains disputed on any reading. Whether “dogs” and “pigs” are outsiders, the contemptuous, or something else is unsettled; we read it as the counterweight that keeps vv.1–5 from becoming indifference.

• The commonest sin in criticism may be confidence, not malice. Most damaging judgments are not made by people who hate their brother; they are made by people who are sure and wrong — who have a fraction of the facts and the whole of the verdict.
• A blind man does not know he is blind. That is the trap in the picture and it is why Revelation 3:17 stings: not realising. If your ignorance announced itself you would not act on it.
• The cure is not more information. If it were, vv.7–11 would prescribe study. They prescribe asking a Father who gives good things. You do not research your way out of self-deception.
• Sight is given back. The passage ends in a promise — διαβλέψεις, you will see clearly — and hands the speck-removal back to you. This is a disqualification with an expiry date.

Step in response: take one person you have a settled opinion about and write down, honestly, the three things you do not know about their situation. That list is the beam. Then pray verses 7–11 over it before you say anything.

• The sand belongs to 7:26, not 7:3. The speck is κάρφος — a dry twig, chaff, a stalk of straw: vegetable matter, not mineral. Sand (ἄμμος) does appear in this chapter, but under the foolish man’s house twenty verses later. The instinct behind the point is sound and arguably better than first stated: both pictures come from the building trade, and they stand at opposite ends of the chapter — a beam at the start, a foundation at the finish.
• “Pretender to knowledge” is a fair gloss on ὑποκριτής — but not its only freight. The theatrical background (the actor playing a part) is real and supports the reading. Yet in the Septuagint ὑποκριτής translates ḥānēp, “godless, profane” (Job 34:30; 36:13), so an ear trained on the Greek Old Testament may hear impious at least as loudly as play-actor. The pretence reading stands; it should not be pressed as the word’s whole meaning.
• Ignorance cannot account for every hypocrite in Matthew. At 6:2, 6:5 and 6:16 the hypocrites know exactly what they are doing — the trumpet sounded before the almsgiving is calculated, not ignorant. So blindness-as-ignorance is the dominant strand in this passage and its immediate neighbours, not a master key to all thirteen of Matthew’s uses of the word.

One further observation, offered as nothing more: Isaiah 56:10 LXX places blinded watchmen and κύνες (“dogs”) in a single verse, and Matthew 7:5–6 places the blinded eye and κυσίν in consecutive verses. We have not seen this argued as an allusion and do not claim it as one — dogs are common currency in both literatures. It is noted so a reader can weigh it, not lean on it.