Mark 4:21 · Bible study
Mark 4:21 Commentary: The Lamp's Purpose
Greek · 10 what the commentators say
Meaning in one sentence
Why does Jesus say a lamp goes on a stand, not under a basket?
Research Summary
- Meaning: Jesus teaches that the gospel, like a lamp, is made to give light, not to be hidden; disciples must openly share what they have received.
- Key words: λύχνος (lamp), μόδιος (basket/modius), κλίνη (bed/couch), λυχνία (lampstand), μήτι (surely not), τίθημι (to put/place).
- Main debate: Whether the lamp primarily represents Jesus himself, the gospel message, or the disciples' good works.
- Theological theme: Revelation and responsibility, God's truth is disclosed for the sake of proclamation, not concealment.
- Best use: A foundation for preaching about evangelism, the public nature of the gospel, and the purpose of spiritual insight.
Translation Comparison
BSB Berean Standard Bible 2020
Jesus also said to them, “Does anyone bring in a lamp to put it under a basket or under a bed? Doesn’t he set it on a stand?
WEB World English Bible 2000
He said to them, “Is a lamp brought to be put under a basket or under a bed? Isn’t it put on a stand?
KJV King James Version 1769
And he said unto them, Is a candle brought to be put under a bushel, or under a bed? and not to be set on a candlestick?
ASV American Standard Version 1901
And he said unto them, Is the lamp brought to be put under the bushel, or under the bed, and not to be put on the stand?
YLT Young's Literal Translation 1898
And he said to them, `Doth the lamp come that under the measure it may be put, or under the couch--not that it may be put on the lamp-stand?
Darby Darby Bible 1890
And he said to them, Does the lamp come that it should be put under the bushel or under the couch? [Is it] not that it should be set upon the lamp-stand?
Douay-Rheims Douay-Rheims Bible 1899
And he said to them: Doth a candle come in to be put under a bushel, or under a bed? and not to be set on a candlestick?
Translations in other languages (10 available)
También les dijo: ¿ Tráese la antorcha para ser puesta debajo del almud, ó debajo de la cama? ¿ No es para ser puesta en el candelero?
E ele lhes disse: Por acaso a lâmpada vem a ser posta debaixo de uma caixa ou sob da cama? Não deve ela ser posta na luminária?
Il leur dit encore: Apporte-t-on la lampe pour la mettre sous le boisseau, ou sous le lit? N’ est-ce pas pour la mettre sur le chandelier?
Und er sprach zu ihnen: Zündet man auch ein Licht an, daß man es unter einen Scheffel oder unter einen Tisch setze? Mitnichten, sondern daß man's auf einen Leuchter setze.
En Hij zeide tot hen: Komt ook de kaars, opdat zij onder de koornmaat of onder het bed gezet worde? Is het niet, opdat zij op den kandelaar gezet worde?
Poi diceva ancora: Si reca forse la lampada per metterla sotto il moggio o sotto il letto? Non è ella recata per esser messa sul candeliere?
Nadto mówił im: Izali przynoszą świecę, aby wstawiona była pod korzec albo pod łoże? izali nie dlatego, aby ją na świecznik wstawiono?
И сказал им: для того ли приносится свеча, чтобы поставить ее под сосуд или под кровать? не для того ли, чтобы поставить ее на подсвечнике?
耶穌又 對他們 說：「人拿 燈來， 豈是 要放在 斗 底下， 床 底下，不 放 在 燈臺上嗎？
And he said to them, When the light comes in, do people put it under a vessel, or under the bed, and not on its table?
Verse in Context
Original Language (Koine Greek)
New Testament · Koine Greek · Mark 4:21
Source: STEPBible TAGNT/TEHB (CC-BY 4.0). Click or tap a morphology code to see the full parsing.
Scholars' Consensus
Commentators across traditions agree that Jesus' rhetorical question about the lamp shows the absurdity of hiding truth. Barnes writes that a lamp 'is not lit up to be put immediately under a measure or a bed, where it can give no light. Its design is to give light.' Adam Clarke adds: 'The design of my preaching is to enlighten men; my parables not being designed to hide the truth, but to make it more manifest.' Gill compares the gospel to a candle the Lord has lighted, 'not his will that it should be always, and altogether, and from all men, covered with parables.' Vincent highlights the Greek: the lamp 'cometh' (ἔρχεται) as an impersonation, typical of Mark's lively narrative. The first question (μήτι) expects a negative answer, the second (οὐχ) expects a positive. The Cambridge Bible notes the definite articles pointing to standard household items. Erasmus, cited by Cambridge, says: 'Do not suppose that what I now commit to you in secret, I would have concealed for ever; the light is kindled by Me in you, that by your ministry it may disperse the darkness of the whole world.'
How settled is the interpretation?
Interpretive difficulty: Medium
Main views:
- The lamp as Jesus' teaching: Barnes and Clarke emphasize that Jesus' parables are meant to clarify truth, not obscure it; the lamp is the gospel itself.
- The lamp as the disciples' mission: Cambridge and Erasmus stress that the disciples are to be the lampstand, bringing light to the world through their ministry.
What is clear: The light must be placed where it can be seen; hiding it defeats its purpose, and the gospel is intended for public proclamation.
What Scholars Agree and Debate
| Topic | Agreed | Debated |
|---|---|---|
| The lamp's identity | The lamp represents something that gives light, generally understood as the gospel, truth, or Jesus himself. | Some commentators (e.g., Poole referencing an early view) hold the lamp is Jesus; others (most modern interpreters) take it as the gospel or the disciples' witness. |
| Who is responsible to shine? | All agree that the light is meant to be visible. | Catholics and some Protestant traditions stress the church's hierarchy as the primary lampstand; many evangelical traditions emphasize every believer's individual witness. |
| Relationship to the parables | This verse comes right after the explanation of the sower and clarifies the purpose of parables. | Barnes and Clarke see the lamp saying as a defense of Jesus' parabolic method, parables are meant to clarify, not obscure. Others (like the Cambridge note) focus on the disciples' future public ministry. |
| The role of 'secret' in v.11 | Some secret has been given to the disciples that is not given to outsiders. | Churches that hold to 'limited revelation' (some Reformed traditions) may see the secret as a special grace for elect leaders; other traditions see it as a temporary insider knowledge that must now be broadcast. |
Historical & Cultural Context
Jesus draws on everyday objects familiar to any first-century Galilean home. The 'lamp' (λύχνος) was a small clay oil lamp, about the size of a cupped hand, fuelled by olive oil. Such a lamp could be placed under a 'basket' (μόδιος), a Latin loanword (modius) for a dry measure holding about nine litres, roughly a peck. Vincent notes this as one of Mark's Latinisms, suggesting a Roman readership. The 'bed' (κλίνη) was a low couch used not only for sleeping but also for reclining at meals. Barnes clarifies: 'Probably the latter is here meant, and is equivalent to our saying a candle is not brought to be put “under” the table, but “on” it.' A lamp placed under a grain measure or a dining couch would be useless; it must go on a 'lampstand' (λυχνία) to give light to the whole room.
The context is crucial. Just before this verse, Jesus had explained the parable of the sower to his disciples, telling them, 'To you is given the secret of the Kingdom of God' (Mark 4:11). The disciples have received privileged insight. Now, with the lamp saying, Jesus immediately counters any notion that this secret is for them alone. The rhetorical structure underscores the point: the first question (μήτι) expects 'no,' the second (οὐχ) expects 'yes.' The lamp's purpose is visibility. So too the gospel's purpose is open proclamation.
The flow continues into verse 22: 'For there is nothing hidden except that it should be made known.' The lamp saying thus functions as a hinge between the private explanation of the parables and the public duty of the disciples. Jesus was not creating an esoteric circle but training his followers for a mission to the world. This interpretation is strengthened by the parallel in Matthew 5:15, 16, where the lamp saying explicitly ties to letting your light shine before others.
Textual Notes
The consulted sources note no significant textual variants for Mark 4:21. The Greek text is consistent across major manuscripts.
Reception History
In early church tradition, this verse was often applied to the duty of teachers and preachers to proclaim the truth boldly. Augustine, in his sermons, used the image of the lamp on a stand to challenge clergy not to conceal sound doctrine out of fear. During the Reformation, both Luther and Calvin cited the verse to argue that the gospel must be preached openly and that Scripture should be available in the common tongue. Medieval commentators like Thomas Aquinas read it as a call to the Church to manifest the light of faith through good works. In modern evangelicalism, Mark 4:21 is frequently quoted in missions appeals and discussions about personal evangelism, emphasizing that every believer is a lamp placed on a stand. The verse has also inspired hymns about spreading the light of Christ, though no specific hymn can be named here without textual basis.
Preaching This Verse
Three-point outline
- The Absurdity of Hidden Light. Jesus poses a question that any listener would answer immediately: no one lights a lamp to hide it. The Greek negative particle μήτι anticipates a firm 'no.' This exposes the intentional absurdity of covering the gospel's light. It is simply not what a lamp is for.
- The Purpose of the Stand. The lamp belongs on a stand (λυχνία). That is its designed location. The stand is not a place of pride but of service: from there the light reaches everyone in the room. The disciples are that stand, the means by which the light of Christ reaches the world.
- The Secrecy That Serves Revelation. Jesus had just given the 'secret of the kingdom' to the disciples (v.11). But that secret is not for hoarding. The lamp saying clarifies that privileged revelation carries the obligation to share. As Erasmus said, 'The light is kindled by Me in you, that by your ministry it may disperse the darkness of the whole world.'
Five-point outline
- The Object: a lamp (λύχνος), a familiar, indispensable household item, small but essential.
- The Absurd Options: under a bushel or a bed, both ridiculous hiding places that defeat the lamp's purpose.
- The Correct Placement: on the stand, the only sensible location for a lamp to fulfil its function.
- The Implied Questioner: Jesus, who had just explained the parable to his disciples, turns their understanding outward.
- The Immediate Application: what you have heard in secret, proclaim from the housetops (cf. Matt 10:27).
Illustration hooks
- The kitchen flashlight you keep in a drawer 'for emergencies' but never use, until a power cut reminds you it's meant to shine, not sit.
- A rescue flare on a lifeboat, stored safely but never fired; it only works when exposed and ignited.
Questions your congregation is asking
- If I have been given insight into God's Word, what am I supposed to do with it that I'm not already doing?
- How do I share the gospel without feeling pushy, especially when Jesus himself seemed to conceal truth in parables?
- Does this verse mean every Christian must be an evangelist, or is it about the church's corporate witness?
Leading a Discussion
Jesus asks a question so basic that a child could answer it. That is exactly his point. The gospel is not a secret for insiders; it is light for the whole world. As you discuss this passage, consider how easy it is to treat your faith as a private possession rather than a public gift.
Discussion questions
- Read Mark 4:21 alongside Luke 8:16. What differences do you notice? Why might Mark's version be blunter?
- Jesus used a μόδιος (a grain measure) as an example of a poor hiding place. What modern 'containers' do we use to hide the light of the gospel, busyness, comfort, fear?
- The word 'brought' (ἔρχεται) is literally 'comes,' as if the lamp itself moves. Why does Mark use this impersonal, vivid phrasing? (Vincent suggests it is typical of Mark's lively style.)
- Verse 22 says nothing hidden will remain hidden. How does that promise both encourage and challenge you?
- In what sense have disciples been given 'the secret of the kingdom' (v.11)? Does this verse suggest that secret is now public property?
- Barnes writes that the lamp 'is not lit up to be put immediately under a measure or a bed, where it can give no light.' How does this description apply to your life this week?
- Erasmus said the light is kindled in you 'that by your ministry it may disperse the darkness of the whole world.' What is one small, concrete step you could take to let your lamp shine in a place where you have been hiding it?
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)
| Isaiah 60:1 | “Arise, shine; for your light has come, and Yahweh’s glory has risen on you! |
| Isaiah 60:3 | Nations will come to your light, and kings to the brightness of your rising. |
| Matthew 5:15 | Neither do you light a lamp and put it under a measuring basket, but on a stand; and it shines to all who are in the house. |
| Luke 8:16 | “No one, when he has lit a lamp, covers it with a container or puts it under a bed; but puts it on a stand, that those who enter in may see the light. |
| Luke 11:33 | “No one, when he has lit a lamp, puts it in a cellar or under a basket, but on a stand, that those who come in may see the light. |
| I Corinthians 12:7 | But to each one is given the manifestation of the Spirit for the profit of all. |
| Ephesians 5:3 | But sexual immorality, and all uncleanness or covetousness, let it not even be mentioned among you, as becomes saints; |
| Ephesians 5:15 | Therefore watch carefully how you walk, not as unwise, but as wise, |
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
Is a candle - put under a bushel! - The design of my preaching is to enlighten men; my parables not being designed to hide the truth, but to make it more manifest.
Barnes' Notes on the Bible Protestant 1832
Barnes insists Jesus' parables were never meant to obscure the truth. Just as a candle is lit to give light, not to be hidden, Jesus taught in parables to illuminate, not conceal. The "bushel" was a grain measure holding about twelve quarts, and the "bed" likely refers to a dining couch.
Cambridge Bible for Schools and Colleges Anglican 1880
The commentator emphasizes that the Greek word refers to a lamp, not a candle, and the bushel is a dry measure for grain. Erasmus applies the image directly: Christ kindles light in His disciples not for concealment, but so their ministry may dispel darkness throughout the world.
Geneva Bible Notes Reformed 1599
The Geneva note emphasizes that Christ's teaching is like a lamp meant to give light, not to be hidden under a container or a bed. The rhetorical question makes the point obvious: the gospel is intended for open display and public proclamation, not concealment.
Gill's Exposition of the Bible Baptist 1748
Gill reads Jesus' question about a candle under a bushel as a self-justifying explanation for why he interpreted the parable of the sower only to his disciples. The Gospel, God's lamp lit in Judea's twilight, was never meant to stay hidden under parables but to be openly communicated, especially to those who would become lights to the world.
Jamieson-Fausset-Brown Commentary Protestant 1871
JFB notes that this saying about a lamp being set on a stand is nearly a direct repetition of the same teaching in Matthew 5:15, directing the reader there for fuller explanation. He also references Luke's version, which adds the purpose that those entering may see the light.
Matthew Henry's Commentary Reformed/Presbyterian 1710
Henry treats the parables as a call to action: those who are good must actively do good, using God's gifts to bring forth fruit. He stresses that God expects both a grateful return and a useful improvement of whatever he has entrusted to us.
Vincent's Word Studies Evangelical 1887
Vincent draws attention to Mark's vivid storytelling: the lamp is personified, "coming" as if alive, and the question is put in an interrogative form for drama. He also points out that Mark uses the Latin word modius for "bushel," a mark of the gospel's Roman audience.
Wesley's Explanatory Notes Methodist/Wesleyan 1754
Wesley sees the candle as Jesus' own teaching, given not to hide but to pass on to others. Any present concealment is temporary, meant only to prepare the truth for a fuller, clearer revelation later. The light is entrusted for sharing, not hoarding.