Luke 6:48 · Bible study
Luke 6:48 Commentary: Building on the Rock
Greek · 7 what the commentators say
Meaning in one sentence
Explore the parable of the wise builder in Luke 6:48. What the rock represents, what 'dig deep' means, and how it applies to hearing and doing Jesus' words.
Research Summary
- Meaning: Obedience to Christ’s words is the only foundation that withstands trials; mere profession collapses.
- Key words: eskapsen (dug) + ebathunen (deepened), two deliberate actions; plēmmura (flood), a medical term for overwhelming pressure; petran (rock), Christ and his teaching.
- Main debate: Whether the rock is Christ alone (Gill, Poole) or Christ’s teaching (many modern readers), or both inseparably.
- Theological theme: The necessity of active obedience for true discipleship; faith as a foundation, not a feeling.
- Best use: A sermon on assurance, perseverance, or the cost of following Jesus; also a warning against self-deception.
Translation Comparison
BSB Berean Standard Bible 2020
He is like a man building a house, who dug down deep and laid his foundation on the rock. When the flood came, the torrent crashed against that house but could not shake it, because it was well built.
WEB World English Bible 2000
He is like a man building a house, who dug and went deep and laid a foundation on the rock. When a flood arose, the stream broke against that house, and could not shake it, because it was founded on the rock.
KJV King James Version 1769
He is like a man which built an house, and digged deep, and laid the foundation on a rock: and when the flood arose, the stream beat vehemently upon that house, and could not shake it: for it was founded upon a rock.
ASV American Standard Version 1901
he is like a man building a house, who digged and went deep, and laid a foundation upon the rock: and when a flood arose, the stream brake against that house, and could not shake it: because it had been well builded.
YLT Young's Literal Translation 1898
he is like to a man building a house, who did dig, and deepen, and laid a foundation upon the rock, and a flood having come, the stream broke forth on that house, and was not able to shake it, for it had been founded upon the rock.
Darby Darby Bible 1890
He is like a man building a house, who dug and went deep, and laid a foundation on the rock; but a great rain coming, the stream broke upon that house, and could not shake it, for it had been founded on the rock.
Douay-Rheims Douay-Rheims Bible 1899
He is like to a man building a house, who digged deep and laid the foundation upon a rock. And when a flood came, the stream beat vehemently upon that house: and it could not shake it: for it was founded on a rock.
Translations in other languages (10 available)
Semejante es al hombre que edifica una casa, el cual cavó y ahondó, y puso el fundamento sobre la peña; y cuando vino una avenida, el río dió con ímpetu en aquella casa, mas no la pudo menear: porque estaba fundada sobre la peña.
Semelhante é ao homem que construiu uma casa, cavou, abriu bem fundo, e pôs o fundamento sobre a rocha; e quando veio a enchente, a corrente bateu com ímpeto naquela casa, e não a pôde abalar, porque estava fundada sobre a rocha.
Il est semblable à un homme qui, bâtissant une maison, a creusé, creusé profondément, et a posé le fondement sur le roc. Une inondation est venue, et le torrent s’ est jeté contre cette maison, sans pouvoir l’ ébranler, parce qu’ elle était bien bâtie.
Er ist gleich einem Menschen, der ein Haus baute und grub tief und legte den Grund auf den Fels. Da aber Gewässer kam, da riß der Strom zum Hause zu, und konnte es nicht bewegen; denn es war auf den Fels gegründet.
Hij is gelijk een mens, die een huis bouwde, en groef, en verdiepte, en leide het fondament op een steenrots; als nu de hoge vloed kwam, zo sloeg de waterstroom tegen dat huis aan, en kon het niet bewegen; want het was op de steenrots gegrond.
Somiglia ad un uomo il quale, edificando una casa, ha scavato e scavato profondo, ed ha posto il fondamento sulla roccia; e venuta una piena, la fiumana ha investito quella casa e non ha potuto scrollarla per che era stata edificata bene.
Podobny jest człowiekowi dom budującemu, który kopał i wykopał głęboko, a założył grunt na opoce; a gdy przyszła powódź, otrąciła się rzeka o on dom, ale nie mogła go poruszyć; bo był założony na opoce.
Он подобен человеку, строящему дом, который копал, углубился и положил основание на камне; почему, когда случилось наводнение и вода наперла на этот дом, то не могла поколебать его, потому что он основан был на камне.
他 像 一個人 蓋 房子， 深深地 挖地， 把根基 安 在 磐石上； 到發 大水的時候，水 沖 那 房子， 房子總不 能 搖動，因為根基立在磐石上（有古卷：因為蓋造 得好）。
He is like a man building a house, who went deep and put the base of it on a rock; and when the water came up and the river was driving against that house, it was not moved, because the building was good.
Verse in Context
Original Language (Koine Greek)
New Testament · Koine Greek · Luke 6:48
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 rock in this parable represents Christ himself or his teaching, and often both together. The man who 'dug and went deep' is the one who does not merely listen to Jesus but puts his words into practice (Cambridge Bible for Schools and Colleges; Gill's Exposition). Vincent's Word Studies draws attention to the Greek verbs: eskapsen ('dug') and ebathunen ('deepened') form a two-stage action, first digging through the sand, then deepening down to the solid rock. The result is a house that cannot be shaken when the flood comes. Clarke refers readers to Matthew 7:24, 27, where the same point is made: obedient hearing is the only foundation that lasts. There is broad agreement, then, that the parable contrasts profession with possession: calling Jesus 'Lord' is not enough; a life built on his words withstands every storm.
How settled is the interpretation?
Interpretive difficulty: Low
What is clear: Jesus contrasts hearing his words with doing them; only the doer builds a life that survives the storm.
What Scholars Agree and Debate
| Topic | Agreed | Debated |
|---|---|---|
| What the rock represents | The rock signifies something absolutely reliable and unshakeable, and is closely tied to Jesus Christ and his words. | Some commentators (Gill, Poole) identify the rock as Christ himself, citing 1 Corinthians 10:4. Others focus on Christ's teaching as the foundation (Cambridge Bible). Most see no contradiction: the rock is both Christ and his doctrine. |
| The meaning of 'digging deep' | Digging deep involves effort beyond passive hearing; it points to serious engagement with God’s word and a life of obedience. | Gill emphasizes searching the Scriptures to find the scheme of salvation. Others (Vincent, Cambridge) stress the practical labor of building on a sure foundation, the two verbs indicate sustained effort. |
| Nature of the flood | The flood represents trials, temptations, or judgment that test the reality of one’s faith. | Some see it primarily as eschatological judgment (the final day). Others read it as present suffering and persecution (Gill). Both are consistent with the parable's structure. |
| Relationship to Matthew's version | Both accounts teach the same central point: obedience to Jesus’ words is essential. | Luke’s wording ('dug deep,' 'flood') adds detail not in Matthew. Cambridge suggests Luke's version may reflect a separate telling. Clarke simply refers readers to Matthew, assuming one event. |
Historical & Cultural Context
This verse concludes Jesus' Sermon on the Plain (Luke 6:17, 49), a collection of teachings that parallel the Sermon on the Mount in Matthew. Luke's version shares the same core parable but includes details absent from Matthew: the words 'dug deep' and the specific Greek term plēmmura for 'flood', a word used only here and in verse 49 in the New Testament.
Vincent notes that plēmmura was a medical term for an excess of bodily fluids, suggesting a picture of overwhelming, life-threatening pressure. The flood likely refers to the sudden flash floods common in Palestinian wadis, dry riverbeds that become raging torrents after rain. A house built on sand would be swept away, but one founded on bedrock held firm.
The rock carries strong Old Testament echoes. God is repeatedly called 'the Rock' of Israel: in the Song of Moses (Deuteronomy 32:15, 18, 31), in Hannah's prayer (1 Samuel 2:2), and in David's psalms (2 Samuel 22:2, 32, 47). By placing this parable at the end of his sermon, Jesus claims for his own words the same absolute reliability that the Old Testament attributed to God himself. The 'house' a person builds is their hope of salvation, the structure of their life and faith. The 'flood' represents any trial that tests that hope: persecution, temptation, error, or judgment (Gill).
Luke also arranges the parable as a direct answer to the question of verse 46: 'Why do you call me, “Lord, Lord,” and don’t do the things which I say?' The wise builder is the one who obeys; the foolish builder hears but does not act. This gives the parable an urgent, personal edge, it is not a general lesson about prudence but a challenge to those who claim to follow Jesus.
Textual Notes
The consulted sources note one significant textual variant. In some manuscripts (Sinaiticus [א], L), the final clause reads 'because it was well built' instead of 'because it was founded on the rock' (Cambridge Bible for Schools and Colleges). The variant appears in some early witnesses and may have arisen to harmonize with the parallel in Matthew or to soften the repetition of the rock. The best-attested reading, 'because it had been founded upon the rock', is supported by the majority of manuscripts and aligns with the theological emphasis of the passage.
No other textual variants for this verse are discussed in the supplied sources.
Reception History
From the early church onward, this parable has been read as a call to practical Christianity. The Didache (first or second century) echoes its language when urging believers to be 'not only hearers but doers.' In the Reformation, the rock was often identified with Christ and his gospel, over against human traditions (Calvin, Luther). Puritan commentators like Matthew Henry and John Gill used the image to warn against self-deception: a house of religious profession could stand for years and still fall when flood and wind came. The parable has been a favorite subject in hymns about assurance and perseverance, for example, Charles Wesley's 'Built on the Rock the Church shall stand', and it remains a staple of preaching on the Sermon on the Mount/Plain across Protestant, Catholic, and Orthodox traditions.
Preaching This Verse
Three-point outline
- The foundation must be chosen before the storm. The wise builder does not wait for a flood to start digging. He works while the weather is fair, because when the water rises it is too late to change foundations. Obedience to Christ happens in the ordinary, untested moments.
- Digging deep is a deliberate act. The Greek puts two verbs together: the man dug and deepened. Getting to rock requires effort. It means searching the Scriptures, examining one’s heart, and building on Christ as the only sure ground (Gill).
- The rock holds because the rock is Christ. The parable closes with a passive verb: the house 'had been founded' on the rock. The builder does the digging, but the foundation is what God has provided. Our work is to lay our trust on what God has already laid.
Five-point outline
- The hearer (v.47): Coming to Jesus, hearing his words, this is the starting point.
- The builder (v.48a): A person who not only hears but acts, pictured as a man building a house.
- The work (v.48b): Digging and deepening to reach rock; the costly effort of learning and obeying.
- The test (v.48c): A flood arises, a stream crashes against the house, trials that expose what is real.
- The outcome (v.48d): The house cannot be shaken, because its foundation was laid on rock. Obedient faith stands.
Illustration hooks
- The dry-season builder. In many parts of the world, people build homes in the dry riverbed because the ground is flat and easy. When the rains come, those houses wash away. Wisdom builds on the hill, harder to reach but safe.
- The homeowner who skips the survey. You can purchase a beautiful piece of land cheaply, only to discover later that it sits on unstable clay. The wise buyer pays for a soil test. Obedience is that costly test before you build.
Questions your congregation is asking
- How do I know whether I am building on rock or sand? The parable says the test will show. Pay attention to how you respond when life falls apart. Do you cling to Jesus’ words, or do you abandon them?
- Does 'digging deep' mean I have to do more religious things? Not necessarily. The digging is about getting to the foundation, Christ himself. It can mean studying Scripture, repenting of hidden sin, or learning to trust God in small ways long before a crisis hits.
Leading a Discussion
Jesus asks a direct question in verse 46: 'Why do you call me, “Lord, Lord,” and don’t do the things which I say?' This parable is his answer. Use the questions below to help your group move from observing the story to examining their own foundations.
Discussion questions
- Read Luke 6:46, 49 together. What does the fact that Jesus begins with a question (v.46) tell you about his priority?
- The man in verse 48 'dug and went deep.' What do you think that looked like in his daily life? What might it look like in yours?
- Jesus calls the obedient builder 'wise' (Matthew 7:24, parallel passage). In what areas of life is it hardest for you to act on what you already know Jesus says?
- The flood in the story is sudden and violent. What kinds of 'floods' have tested your faith, or are testing it now?
- Notice that the house 'had been founded' on the rock (passive voice). Who does the founding, and who does the digging? How do human effort and divine provision work together in this picture?
- Compare verse 48 with the fate of the foolish builder in verse 49: 'the ruin of that house was great.' Why does Jesus end his sermon with such a stark warning?
- How might this parable change the way you pray or read Scripture 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)
| Deuteronomy 32:15 | But Jeshurun grew fat, and kicked. You have grown fat. You have grown thick. You have become sleek. Then he abandoned God who made him, and rejected the Rock of his salvation. |
| Deuteronomy 32:18 | Of the Rock who became your father, you are unmindful, and have forgotten God who gave you birth. |
| Deuteronomy 32:31 | For their rock is not as our Rock, even our enemies themselves concede. |
| I Samuel 2:2 | There is no one as holy as Yahweh, for there is no one besides you, nor is there any rock like our God. |
| II Samuel 22:2 | and he said: “Yahweh is my rock, my fortress, and my deliverer, even mine; |
| II Samuel 22:5 | For the waves of death surrounded me. The floods of ungodliness made me afraid. |
| II Samuel 22:32 | For who is God, besides Yahweh? Who is a rock, besides our God? |
| II Samuel 22:47 | Yahweh lives! Blessed be my rock! Exalted be God, the rock of my salvation, |
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
6 public-domain commentaries, condensed into plain language.
Adam Clarke's Commentary Methodist/Wesleyan 1826
Clarke directs the reader to his notes on Matthew 7:24-27, indicating he sees this verse as a direct parallel to the parable of the wise and foolish builders. His commentary on this verse is essentially a cross-reference to that fuller explanation.
Cambridge Bible for Schools and Colleges Anglican 1880
The Cambridge Bible commentary highlights that the original Greek describes an ongoing, strenuous effort: the man "dug, and kept deepening" his foundation. The rock represents Christ and His teaching, the only foundation that withstands both flood and fire. A variant reading emphasizes the quality of construction: "because it was well built."
Geneva Bible Notes Reformed 1599
The Geneva note emphasizes that true stability comes only from thorough preparation: digging deep and laying the foundation on rock. When the flood beats against such a house, it cannot be shaken precisely because it is grounded on that rock, not merely resting on the surface.
Gill's Exposition of the Bible Baptist 1748
Gill interprets the digging deep as a sinner's diligent search of Scripture to uncover God's hidden plan of salvation through Christ. Finding Christ as the rock of ages, he builds his eternal hope on that foundation, which no flood of temptation, persecution, or false teaching can shake.
Matthew Henry's Commentary Reformed/Presbyterian 1710
Henry emphasizes that the measure we use for others is the exact measure God uses for us, making mercy and generosity the only safe path.
Vincent's Word Studies Evangelical 1887
Vincent highlights that the Greek behind "digged deep" actually describes two separate actions: digging through loose sand and then deepening down into solid rock. He also notes that the words for "flood" and "beat vehemently" appear only here in Luke, where they carry medical meanings — excess bodily fluids and ruptured veins.