Luke 11:34 · Bible study
Luke 11:34 Commentary: The Single Eye and Spiritual Integrity
Greek · 9 what the commentators say
Meaning in one sentence
What does Jesus mean by a 'single' eye? Explore the Greek term ἁπλοῦς and how our inner vision shapes a life of light or darkness.
Research Summary
- Meaning: The eye as spiritual perception, a single, wholehearted focus on God brings light to the whole person; a divided or envious eye brings darkness.
- Key words: ἁπλοῦς (haplous), single, sound, generous; πονηρός (ponēros), evil, diseased, stingy.
- Main debate: Does 'single eye' primarily denote moral singleness of purpose, generosity toward others, or the natural state of spiritual health? All are present in the tradition.
- Theological theme: Integrity, the unity of inner and outer life before God; wholehearted discipleship.
- Best use: Teaching on inner purity, spiritual discernment, and the danger of a divided heart.
Translation Comparison
BSB Berean Standard Bible 2020
Your eye is the lamp of your body. When your eyes are good, your whole body also is full of light. But when they are bad, your body is full of darkness.
WEB World English Bible 2000
The lamp of the body is the eye. Therefore when your eye is good, your whole body is also full of light; but when it is evil, your body also is full of darkness.
KJV King James Version 1769
The light of the body is the eye: therefore when thine eye is single, thy whole body also is full of light; but when thine eye is evil, thy body also is full of darkness.
ASV American Standard Version 1901
The lamp of thy body is thine eye: when thine eye is single, thy whole body also is full of light; but when it is evil, thy body also is full of darkness.
YLT Young's Literal Translation 1898
`The lamp of the body is the eye, when then thine eye may be simple, thy whole body also is lightened; and when it may be evil, thy body also is darkened;
Darby Darby Bible 1890
The lamp of the body is thine eye: when thine eye is simple, thy whole body also is light; but when it is wicked, thy body also is dark.
Douay-Rheims Douay-Rheims Bible 1899
The light of thy body is thy eye. If thy eye be single, thy whole body will be lightsome: but if it be evil, thy body also will be darksome.
Translations in other languages (10 available)
La antorcha del cuerpo es el ojo: pues si tu ojo fuere simple, también todo tu cuerpo será resplandeciente; mas si fuere malo, también tu cuerpo será tenebroso.
A lâmpada do corpo é o olho. Sendo pois teu olho bom, também todo teu corpo será luminoso; porém se for mau, também todo teu corpo será tenebroso.
Ton œil est la lampe de ton corps. Lorsque ton œil est en bon état, tout ton corps est éclairé; mais lorsque ton œil est en mauvais état, ton corps est dans les ténèbres.
Das Auge ist des Leibes Licht. Wenn nun dein Auge einfältig ist, so ist dein ganzer Leib licht; so aber dein Auge ein Schalk ist, so ist auch dein Leib finster.
De kaars des lichaams is het oog: wanneer dan uw oog eenvoudig is, zo is ook uw gehele lichaam verlicht; maar zo het boos is, zo is ook uw gehele lichaam duister.
La lampada del tuo corpo è l’occhio; se l’occhio tuo è sano, anche tutto il tuo corpo è illuminato; ma se è viziato, anche il tuo corpo è nelle tenebre.
Świecą ciała jest oko; jeźliby tedy oko twoje było szczere, i ciało twoje wszystko będzie jasne; a jeźliby złe było, i ciało twoje ciemne będzie.
Светильник тела есть око; итак, если око твое будет чисто, то и все тело твое будет светло; а если оно будет худо, то и тело твое будет темно.
你 眼睛 就是 身上 的燈。 你的 眼睛 若 瞭亮， 全 身 就 光明； 眼睛若 昏花， 全身 就 黑暗。
The light of the body is the eye: when your eye is true, all your body is full of light; but when it is evil, your body is dark.
Verse in Context
Original Language (Koine Greek)
New Testament · Koine Greek · Luke 11:34
Source: STEPBible TAGNT/TEHB (CC-BY 4.0). Click or tap a morphology code to see the full parsing.
Scholars' Consensus
Commentators agree that the eye in this verse represents the faculty of spiritual perception. The Cambridge Bible calls it the 'inward eye' of conscience, echoing Ephesians 1:17, 18. The key term ἁπλοῦς (haplous), rendered 'single' in the KJV, 'good' in the WEB, Thayer defines as 'simple, single, whole, sound, fulfilling its office.' From this, the consensus view is that a 'single' eye means spiritual vision that is clear, undivided, and focused wholly on God. Gill describes it as the understanding enlightened by the Spirit, producing light throughout the soul. Wesley adds that when the eye aims at anything else, the whole body is full of darkness. The metaphor, then, is not about physical sight but about moral and spiritual integrity: a heart set on God makes a person's whole being luminous.
How settled is the interpretation?
Interpretive difficulty: Low
What is clear: The overarching metaphor is that our inner spiritual condition — whether wholehearted or divided — determines whether we walk in light or darkness.
What Scholars Agree and Debate
| Topic | Agreed | Debated |
|---|---|---|
| The meaning of 'single' (ἁπλοῦς) | It describes a healthy, sound, or undistracted condition of spiritual perception. | Some traditions emphasise moral singleness of heart (Matthew Henry); others link it to generosity, contrasting with the 'evil eye' of stinginess (Proverbs 28:22). |
| The 'evil eye' (πονηρός) | It denotes a diseased or corrupted spiritual condition that leads to darkness. | Whether it refers primarily to envy and greed, to general moral corruption, or to a deliberate rejection of truth (Isaiah 6:10). |
| Connection to Matthew's version (Matthew 6:22, 23) | The saying is the same in substance, teaching about wholehearted devotion. | Matthew places it in the Sermon on the Mount after teaching on treasure and money; Luke places it after a demand for signs. This affects which nuance (generosity vs. spiritual perception) is foregrounded. |
| Whether the metaphor includes the need for the Holy Spirit’s work | Spiritual sight is a gift; God opens the eyes (Psalm 119:18). | Reformed traditions stress the Spirit's sovereign enlightenment; Wesleyan traditions highlight human response and cooperation. |
Historical & Cultural Context
This verse sits within Jesus' response to those demanding a sign (Luke 11:29). He has just declared that the only sign given will be the sign of Jonah, His own resurrection. Then, in verses 33, 36, He uses light imagery to drive the point home: the true sign is not an external spectacle but the inner condition of the hearer.
In Jewish and Greco-Roman thought, the eye was commonly seen as the lamp of the body, the organ through which light enters. But Jesus gives it a moral twist. The contrast between a 'single' (ἁπλοῦς) eye and an 'evil' (πονηρός) one echoes Old Testament language. Proverbs 28:22 warns, 'A stingy man hurries after riches, and doesn't know that poverty waits for him'; there the 'evil eye' denotes covetousness. The same phrase appears in the context of generosity and envy. Jesus, then, may be drawing on that tradition: a 'single' eye is a generous, straightforward heart; an 'evil' eye is a grudging, divided one.
The immediate context reinforces this. In verse 33, a lamp is lit not to be hidden but to give light. The Pharisees, who are about to host Jesus for dinner (v.37), are the very ones whose inward eye has become dark, they are obsessed with external washing while missing the weightier matters of justice and mercy. The metaphor challenges every hearer: your inner vision determines whether you live in the light of God's kingdom or stumble in the dark of self-interest.
Textual Notes
The consulted sources note no significant textual variants for verse 34 itself. However, verses 35, 36 are absent from some manuscripts and vary in others. Adam Clarke observes they 'are wanting in some MSS., and are variously read in others.' Gill notes they are missing from 'Beza's most ancient copy.' Most modern critical editions include them, and their content is consistent with Jesus' teaching elsewhere (Matthew 6:23). The text of verse 34 is secure.
Reception History
From the early church onward, this verse has been a touchstone for teaching on spiritual integrity. Clement of Alexandria used the 'single eye' to describe the pure heart that sees God. In the Reformation, the Geneva Bible notes interpret the eye as the mind's understanding, and John Calvin read it as a call to simplicity in faith. Matthew Henry (17th century) applied it to the contrast between a sincere disciple and a hypocrite who wants signs. John Wesley (18th century) stressed that an 'evil eye' is one that aims at anything besides God. The phrase 'single eye' entered devotional language as shorthand for undivided allegiance to Christ, a theme echoed in hymns and in spiritual formation literature across traditions.
Preaching This Verse
Three-point outline
- Your eye is the lamp of your whole being. The eye represents your spiritual perception, what you value, where you fix your attention. It directs everything else.
- A single eye brings light. The Greek word haplous means whole, sound, sincere. When your desires are unified around God, not torn between Him and the world, your whole life becomes bright.
- An evil eye brings darkness. The word ponēros can mean evil, diseased or stingy. A divided heart, envy, or greed clouds your vision and leaves you in the dark.
Five-point outline
- The metaphor established, the eye as the body's lamp.
- The two conditions, single/good vs. evil.
- The consequences, whole body full of light or full of darkness.
- The warning (v.35): take care that the light within you is not darkness.
- The promise (v.36): a life full of light has no dark part, shining like a bright lamp.
Illustration hooks
- A camera with a smudged lens takes blurry photos; clean the lens and everything sharpens. Our heart's focus works the same way.
- Walking into a room with one clear window lets in plenty of light. Cover that window with dust or film, and the room dims. What 'dust' is clouding your spiritual vision?
- Think of a child who wants only one thing, a parent's attention. That single-minded trust brings joy. The 'single eye' is that kind of focused love toward God.
Questions your congregation is asking
- How do I know if my 'eye' is single or evil? What are the symptoms of a divided heart?
- Does this mean I should never have any ambitions except spiritual ones?
- What do I do if I feel like my inner light has turned to darkness, how do I get it back?
Leading a Discussion
Jesus uses a simple, memorable image to probe the deepest thing about us: the orientation of our heart. This verse invites honest self-examination, not condemnation. As you discuss, keep the tone curious and open.
Discussion questions
- Read Luke 11:33, 36 aloud together. What stands out to you about the way Jesus uses light and darkness?
- What do you think the 'eye' represents in this metaphor? Why does Jesus call it the 'lamp of the body'?
- The Greek word haplous can be translated 'single,' 'sound,' or 'generous.' How does each shade of meaning deepen your understanding of the verse?
- In what ways does the surrounding context, especially Jesus' words about the sign of Jonah and the Pharisees' hypocrisy, help you understand what He means by a 'good' or 'evil' eye?
- How would you describe the difference between a 'single eye' and a 'divided eye' in practical, everyday terms?
- Why does Jesus add the warning in verse 35: 'See whether the light that is in you isn't darkness'? What kind of self-deception is He guarding against?
- What is one area of your life where you sense an invitation to greater singleness of heart toward God this week?
Word Study
The key original-language words in this verse. Select any word for its full lexicon entry — meaning, every occurrence in Scripture, and related words.
Cross-References
Source: Treasury of Scripture Knowledge (TSK, public domain)
| Genesis 19:11 | They struck the men who were at the door of the house with blindness, both small and great, so that they wearied themselves to find the door. |
| II Kings 6:15 | When the servant of the man of God had risen early and gone out, behold, an army with horses and chariots was around the city. His servant said to him, “Alas, my master! What shall we do?” |
| II Kings 6:20 | When they had come into Samaria, Elisha said, “Yahweh, open these men’s eyes, that they may see.” Yahweh opened their eyes, and they saw; and behold, they were in the middle of Samaria. |
| Psalms 81:12 | So I let them go after the stubbornness of their hearts, that they might walk in their own counsels. |
| Psalms 119:18 | Open my eyes, that I may see wondrous things out of your law. |
| Proverbs 28:22 | A stingy man hurries after riches, and doesn’t know that poverty waits for him. |
| Isaiah 6:10 | Make the heart of this people fat. Make their ears heavy, and shut their eyes; lest they see with their eyes, hear with their ears, understand with their heart, and turn again, and be healed.” |
| Isaiah 29:10 | For Yahweh has poured out on you a spirit of deep sleep, and has closed your eyes, the prophets; and he has covered your heads, the seers. |
Interlinear and lexical data from STEPBible (CC BY 4.0). Cross-reference data from OpenBible.info (CC BY 4.0). Commentaries are public domain.
For personal reflection
Read the devotional page — prayer, application, and "for families"
What the Commentators Say
9 public-domain commentaries, condensed into plain language.
Adam Clarke's Commentary Methodist/Wesleyan 1826
Clarke notes that the phrase can be translated either as "the light of the body is the eye" or "the eye is the lamp of the body." He also observes that verses 35 and 36 are missing from some manuscripts and read differently in others, indicating textual variation.
Barnes' Notes on the Bible Protestant 1832
Barnes notes that the same material appears in Matthew's Gospel, though in a different setting, and refers readers to his comments there for fuller explanation. This is a cross-referencing observation rather than a fresh interpretation.
Cambridge Bible for Schools and Colleges Anglican 1880
The commentator rephrases the saying so that the eye is the lamp, not the light, and identifies it as the inward eye of conscience. A single eye means pure and unsophisticated; an evil eye means hateful and carnal. When that inward eye turns carnal, it cannot see spiritual things.
Geneva Bible Notes Reformed 1599
The light of the bodie is the eye: therefore when thine eye is single, then is thy whole bodie light: but if thine eye be euill, then thy bodie is darke.
Gill's Exposition of the Bible Baptist 1748
Gill compares the physical eye to the understanding, which guides the soul like the eye guides the body. When the understanding is enlightened by the Spirit and focused on gospel truth, the whole soul is filled with light and comfort. But when the understanding is darkened by ignorance, the soul is left in misery.
Lange's Commentary Reformed 1857
Lange emphasises that the sign of Jonah points to Christ’s resurrection: as Jonah emerged from the fish, so the risen Jesus will be the sign for this generation. He also notes that the Ninevites believed Jonah’s preaching without any miracle, yet the Jews rejected Christ even after His resurrection, making their judgment greater.
Matthew Henry's Commentary Reformed/Presbyterian 1710
Henry argues that the resurrection of Christ was the great sign still to come, the most convincing proof that God sent him. The people's demand for additional miracles was a reproof: they had already received many signs but wanted their curiosity gratified rather than their consciences informed.
Vincent's Word Studies Evangelical 1887
Single - full of light. See on Mt 6:22 .
Wesley's Explanatory Notes Methodist/Wesleyan 1754
Wesley defines an evil eye as aiming at anything other than God. When the eye is set on a wrong goal, the whole person becomes filled with folly, sin, and misery, the direct opposite of the single-minded devotion that brings light.