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Proverbs 27:17

“Mutual Refinement and Human Nature”Proverbs 27:17–22
King James Version
Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.

Bible text: King James Version (1769 Blayney text) · Public domain

KJV (with Strong's)
Iron H1270 sharpeneth H2300 iron H1270; so a man H376 sharpeneth H2300 the countenance H6440 of his friend H7453.

Bible text: King James Version with Strong's numbers · Public domain

Berean Standard Bible
As iron sharpens iron, so one man sharpens another.

Bible text: Berean Standard Bible · Public domain

American Standard Version
Iron sharpeneth iron; So a man sharpeneth the countenance of his friend.

Bible text: American Standard Version (1901) · Public domain

World English Bible Messianic
Iron sharpens iron; so a man sharpens his friend’s countenance.

Bible text: World English Bible, Messianic edition · Public domain

Geneva Bible (1599)
Yron sharpeneth yron, so doeth man sharpen the face of his friend.

Bible text: Geneva Bible (1599) · Public domain

Young's Literal Translation
Iron by iron is sharpened, And a man sharpens the face of his friend.

Bible text: Young's Literal Translation · Public domain

King James Version — Interlinear
7 Hebrew words
  1. בַּרְזֶלbar·ZelironH1270N-msNoun Singular Masculine Absolute
  2. בְּבַרְזֶלbe·var·Zelby ironH1270Prep-b ¦ N-msNoun Singular Masculine Absoluteבְּbyבַרְזֶלiron
  3. יָחַדYa·chadit grows sharpH2300V-Hiphil-Imperf-3msVerb Hiphil Imperfect 3rd Singular Masculine
  4. וְאִישׁve·'Ishand eachH376Conj-w ¦ N-msNoun Singular Masculine Absoluteוְandאִישׁeach
  5. יַחַדYa·chadhe sharpensH2300V-Hiphil-Imperf-3msVerb Hiphil Imperfect 3rd Singular Masculine
  6. פְּנֵיpe·nei[the] face ofH6440N-mpcNoun Plural Masculine Construct
  7. רֵעֵהוּre·'E·huhis neighborH7453N-msc ¦ 3msNoun Singular Masculine Construct with suffixרֵעֵneighborהוּhis
English is a literal word-by-word gloss of the Hebrew, not the KJV's wording. Why?

This is the original text the KJV's translators worked from — each Hebrew word with its own literal English meaning in this verse, prepared by scholars at Tyndale House, Cambridge. The KJV translates whole sentences, not word by word, so its wording differs: one Hebrew word can become several English words, and the KJV may choose “the LORD” where the gloss reads “Yahweh”. Both are faithful — they answer different questions. For the KJV's own rendering, switch to the KJV text.

Words in [ ] are added by the English.

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In the KJVVerse 17,187 of 31,102 · 55.3%

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This verse

As one piece of iron puts an edge on another, friends make each other keener and wiser through honest, caring dealings with one another.

“Iron sharpeneth iron;”

Barzel is the hard metal tools were made of, and châdad means to make sharp or keen. The same metal sharpens and is sharpened.

“so a man sharpeneth the countenance of his friend.”

The countenance is the face, pânîym, where a person’s character and alertness show. The friend, rêaʻ, is a companion or neighbour we share life with.

Iron Sharpens Iron, and Praise Tests a Man

Proverbs 27:17–22

Summary

These six proverbs come from the sayings of Solomon that the men of King Hezekiah copied out. They look at what passes between people and at what it shows about the heart. Friends sharpen each other as iron sharpens iron. The one who keeps a fig tree eats its fruit, and the servant who looks after his master is honoured. As water gives back a face, one heart answers another. “Hell and destruction are never full”, and the eyes of man are just as hungry. Praise tests a man the way fire tests silver and gold, and a fool keeps his folly even if he is pounded like grain in a mortar. Together they teach us to choose our friends well, to serve faithfully, to know our own hearts, to receive praise humbly, and to look to God for the satisfaction and the change of heart that only he can give.

Iron sharpens iron: what friends do for each other

Proverbs 27 belongs to the “proverbs of Solomon, which the men of Hezekiah king of Judah copied out” (Proverbs 25:1), a collection that runs from chapter 25 to chapter 29. Most of its sayings stand alone in two short lines, and this chapter comes back again and again to friendship. A few verses earlier it speaks of the open rebuke and faithful wounds of a friend (Proverbs 27:5–6) and of the sweetness of a friend’s counsel (Proverbs 27:9–10). Verse 17 gathers that teaching into one picture: “Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.”

Iron, barzel, was the hard metal that tools and blades were made from, and anyone who kept tools knew that one iron edge worked against another comes away keener. The verb châdad means to be sharp or to make sharp, and figuratively to be keen or severe. The same metal does the sharpening and receives it, so the picture is of two people who each give and each gain. Every one of us is both the iron that sharpens and the iron being sharpened.

What it means to sharpen a friend’s countenance

The countenance is the face. The Hebrew pânîym is plural in form and always used as a singular, and from the face itself come its other senses of front, surface and presence. The face is where a person’s mood, alertness and character show, so to sharpen a friend’s countenance is to make the whole person keener: wiser in judgment, firmer in character and better able to meet what life brings. Proverbs keeps tracing life back to what is within: “Keep thy heart with all diligence; for out of it are the issues of life” (Proverbs 4:23).

The friend is a rêaʻ, an associate, companion or neighbour, someone we share life with to a greater or lesser degree. Strong’s derives the word from a verb meaning to associate with someone as a friend. Sharpening happens best between people who trust each other, because honest challenge is hard to receive from a stranger.

How friends sharpen one another

Sharpening involves friction. A good friend tells us the truth, holds us to account and encourages us, and each of these can rub before it helps. God made us to live in relationship, and he uses these dealings to shape and mature his people. Israel was commanded, “thou shalt love thy neighbour as thyself” (Leviticus 19:18), and the whole community was to care for one another’s good. So the company we keep matters a great deal: “He that walketh with wise men shall be wise: but a companion of fools shall be destroyed” (Proverbs 13:20). The Preacher says, “Two are better than one”, for if one falls, the other lifts him up (Ecclesiastes 4:9–10).

The New Testament asks the same of the church. Paul tells the Romans he is persuaded that they are “able also to admonish one another” (Romans 15:14). The letter to the Hebrews says, “And let us consider one another to provoke unto love and to good works”, and goes on to urge believers to keep meeting together (Hebrews 10:24–25). We are to be “teaching and admonishing one another” (Colossians 3:16) and to “Bear ye one another’s burdens, and so fulfil the law of Christ” (Galatians 6:2). Speaking the truth in love, the body grows up into Christ its head, with every part supplying what the whole needs (Ephesians 4:15–16), and the whole building rests on Christ as its chief corner stone (Ephesians 2:20).

Christ himself is the one who sharpens his people most of all. His disciples were sharpened by his teaching, his searching questions and his example of righteousness, humility and love. Their misunderstandings, failures and self-centredness met his truth and grace, and they grew. He still does this work through his Spirit and through the believers he joins together, shaping us into the image of the Son.

Keeping the fig tree: faithful service and its honour

“Whoso keepeth the fig tree shall eat the fruit thereof: so he that waiteth on his master shall be honoured.” Fig trees were common in Israel and gave both food and shade, and they needed steady care, from planting and watering to pruning and guarding against pests. To keep the tree is nâtsar, to guard, protect and watch over, the active care of someone who looks after what has been entrusted to him. The one who gives that care eats the fruit.

The second line carries the same truth over to service. The servant may be a household servant, but the saying fits an apprentice, a worker or a king’s loyal subject just as well. To be honoured is kâbad, a word whose root sense is to be heavy or weighty, so the faithful servant gains weight in his master’s eyes. That honour can come as respect, trust, recognition or greater responsibility.

Does “waiteth on his master” mean idle waiting?

“Waiteth” translates shâmar, which means to guard, keep watch over and attend to, so the servant here is busy with his master’s needs and interests. It is the same kind of active care that nâtsar describes for the fig tree. He carries out his instructions faithfully, watches over what belongs to his master and is ready for what is needed.

Diligence, reward and the God who honours

This chapter opens with a warning against boasting about tomorrow (Proverbs 27:1), and it closes with a call to “be thou diligent to know the state of thy flocks” (Proverbs 27:23). Between the two, verse 18 shows honour coming through humble, steady work. Proverbs often sets diligence against laziness: “Go to the ant, thou sluggard; consider her ways, and be wise” (Proverbs 6:6), and “The hand of the diligent shall bear rule: but the slothful shall be under tribute” (Proverbs 12:24). Paul states the wider rule: “whatsoever a man soweth, that shall he also reap” (Galatians 6:7). The fig tree giving its fruit and the faithful servant receiving honour belong to one order that God has set in his world.

That order reaches its height in God himself. He says, “them that honour me I will honour” (1 Samuel 2:30), and in the parable the master says, “Well done, thou good and faithful servant: thou hast been faithful over a few things, I will make thee ruler over many things” (Matthew 25:21). Faithfulness in small things often leads to greater trust and blessing. The “fig tree” in our own lives may be a family, a job, a church or our own walk with God, and the faithful keeping of it is honoured.

Jesus is the true servant of God, who “came not to be ministered unto, but to minister, and to give his life a ransom for many” (Mark 10:45). He kept his Father’s commandments perfectly (John 15:10), and though he were a Son, “yet learned he obedience by the things which he suffered”, becoming “the author of eternal salvation unto all them that obey him” (Hebrews 5:8–9). His Father honoured him above all: “God also hath highly exalted him” (Philippians 2:9), and made him “both Lord and Christ” (Acts 2:36). He is the pattern for everyone who serves the true Master.

As in water face answereth to face: what the heart shows

“As in water face answereth to face, so the heart of man to man.” Water, mayim, is dual in form and singular in sense, and here it is still water clear enough to give back a reflection. A still pool was the mirror most people had, so everyone knew the picture. The face, pânîym, looks into the water and the same face looks back, matching it exactly.

The heart, lêb (also written lêbāb), is much more than the seat of feeling in Scripture. It is the whole inner person: mind, will, conscience, desires and character, the place where thought and decision begin. So the proverb is about the deepest part of one person meeting the deepest part of another. As the water answers the face, heart answers heart. In honest, lasting dealings with others, what is in us comes to light. Others see it, and we come to see it too, because the way people answer us shows us things about ourselves that we would otherwise miss. Others can often see our blind spots more clearly than we can.

Can people hide their hearts?

People can keep up a front in brief or shallow meetings, and in close, honest relationships over time the true heart tends to come out. Even so, only God knows the heart fully. “The heart is deceitful above all things, and desperately wicked: who can know it? I the LORD search the heart” (Jeremiah 17:9–10). “The ways of man are before the eyes of the LORD” (Proverbs 5:21), and “all things are naked and opened unto the eyes of him with whom we have to do” (Hebrews 4:13). So we pray with David, “Search me, O God, and know my heart” (Psalm 139:23–24).

The mirror of God’s word and the face of Christ

Scripture uses the mirror in other places too. James compares the man who hears the word and forgets it to one who looks at his face in a glass and walks away (James 1:23–25), and Paul says that now we see “through a glass, darkly; but then face to face” (1 Corinthians 13:12). True self-knowledge comes as we meet the truth, in God’s word and in the honest words of others.

Christ is “the brightness of his glory, and the express image of his person” (Hebrews 1:3). In him we see the Father, and before him our own hearts are shown for what they are. He knew what was in people: Jesus, “knowing their thoughts” (Matthew 9:4), answered what they had not said aloud, and he “knew their thoughts” in the synagogue (Luke 6:8). He shows us our sin and our need, and he gives what he promised through Ezekiel: “A new heart also will I give you, and a new spirit will I put within you” (Ezekiel 36:26). As we behold his glory “as in a glass”, we “are changed into the same image from glory to glory” (2 Corinthians 3:18).

Hell and destruction are never full: the hunger of human desire

“Hell and destruction are never full; so the eyes of man are never satisfied.” The first line pictures the grave and destruction (Abaddon) as having an appetite that keeps swallowing the dead and is always empty for more. The verb for being full, sâbaʻ, means to be sated, to be filled to satisfaction, to have enough. The second line gives the same verb to the eyes, ʻayin. The eyes here stand for the whole of human desire: the appetite that looks at what it sees and wants it, whether wealth, power, pleasure, knowledge or recognition. Aimed at created things, that desire is a bottomless pit, and the more it takes in, the more it wants.

The wisdom books say this more than once. “The eye is not satisfied with seeing, nor the ear filled with hearing” (Ecclesiastes 1:8), from a chapter that laments the emptiness of life under the sun (Ecclesiastes 1). Agur lists four things that say not, “It is enough”, and the grave is the first (Proverbs 30:15–16). The doubled “never full” and “never satisfied” is strong language on purpose, to make us feel how deep human discontent runs.

Does “Hell” here mean the place of final punishment?

The word translated “Hell” is shᵉʼôwl, Sheol, which in the Old Testament means the grave or the realm of the dead that receives everyone who dies. The proverb uses it as a picture of something that keeps receiving and is never filled. It speaks of death and the grave, and it is a different word from Gehenna, which the New Testament uses for the place of final judgment. The psalmist speaks of Sheol in the same way: “For in death there is no remembrance of thee: in the grave who shall give thee thanks?” (Psalm 6:5).

Where the eyes are satisfied

We were made to find our satisfaction in God, and a heart that looks for it in created things stays restless. This hunger is part of our fallen condition. The answer to it is God himself: “O God, thou art my God; early will I seek thee: my soul thirsteth for thee” (Psalm 63:1). Jesus says, “I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst” (John 6:35). To the Samaritan woman he offered water that would leave her thirsting no more, “a well of water springing up into everlasting life” (John 4:13–14). He tells us to “seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you” (Matthew 6:33). Paul learned contentment in Christ: “I have learned, in whatsoever state I am, therewith to be content” (Philippians 4:11–13). The eyes that wander after everything are filled at last when they see the glory of God in the face of Jesus Christ, for “in thy presence is fulness of joy; at thy right hand there are pleasures for evermore” (Psalm 16:11).

The fining pot and the furnace: how praise tests a man

“As the fining pot for silver, and the furnace for gold; so is a man to his praise.” The fining pot, mitsrêph, is a crucible, a vessel made to stand great heat, and its name comes from a root meaning to refine or purge. The furnace, kûwr, is a larger and hotter heating place. Silver and gold were used for money, trade and ornament, and for the furnishings of the tabernacle (Exodus 25) and later the temple. Heat separates these metals from their dross and shows how pure they are.

The second line applies the picture to “a man”, ʼîysh, any person at all. “His praise” is mahălâl, fame or praise, from the root hâlal, to praise, to boast or to shine. It means the commendation, honour and public acclaim a person receives. Praise is the heat, and how a man receives it shows what he is. Humility and gratitude come through it like pure metal, while pride, self-importance and the hunger for approval show up like dross.

Why praise is a test

Hardship tests our endurance, faith and dependence on God. Praise tests our humility, integrity and where our security rests. It can puff a person up, make him feel self-sufficient, or quietly take for himself the glory that belongs to God. Proverbs warns that “Pride goeth before destruction, and an haughty spirit before a fall” (Proverbs 16:18), and that “A man’s pride shall bring him low: but honour shall uphold the humble in spirit” (Proverbs 29:23).

God is the refiner of hearts, and he uses every kind of experience, pleasant and painful alike, to show what is in us and to purify his people. “For thou, O God, hast proved us: thou hast tried us, as silver is tried” (Psalm 66:10). Peter says our faith is “tried with fire” and found more precious than gold (1 Peter 1:6–7). The LORD searches the heart (Jeremiah 17:9–10), for “man looketh on the outward appearance, but the LORD looketh on the heart” (1 Samuel 16:7).

Is praise bad, then?

Praise received with humility and gratitude is a good gift. It encourages, it recognises good work and it can spur a person on to further faithful service. The danger lies in the heart’s response, when praise becomes a person’s own glory or the source of who he is. Wisdom is careful in giving praise and in receiving it, and it gives the glory to God.

Christ under praise

Jesus met both great praise and bitter rejection with the same pure heart. Praise brought out no dross in him, because there was none, and it only showed his glory and his devotion to the Father. When the crowd wanted to make him king after he fed the five thousand, he withdrew (John 6:15). When they shouted “Hosanna to the son of David” (Matthew 21:9), he went on in obedience to the Father. He said, “I receive not honour from men” (John 5:41), and “I seek not mine own glory” (John 8:50). He also refines us. He “gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people” (Titus 2:14), so that we may live “to the praise of his glory” (Ephesians 1:12). By his Spirit we can receive praise as he did, and pass it on to God.

The fool in the mortar: why folly stays

“Though thou shouldest bray a fool in a mortar among wheat with a pestle, yet will not his foolishness depart from him.” To bray is kâthash, to pound or crush, the work done to grain in a mortar. The mortar (maktêsh) was usually a heavy stone basin, and the pestle (ʻĕlîy) a solid tool of wood or stone, and the people of Israel used them every day to grind grain and crush spices. It was hard, heavy work meant to break tough material down into something useful. “Among wheat” pictures the fool being treated like grain, pounded in the hope that something useful will come of him.

The picture is deliberately extreme, since no one would actually pound a man in a mortar. It makes its point by exaggeration: even the most forceful pressure from outside leaves the fool as he was. Pounding wheat gives flour, and pounding a fool gives the same fool.

Who is the fool in Proverbs?

The fool, ʼĕvîyl, is the foolish man, and his foolishness, ʼivveleth, comes from the same root and names his folly. Proverbs describes such a man by his lack of the fear of God and his unwillingness to listen to advice. “The fear of the LORD is the beginning of knowledge: but fools despise wisdom and instruction” (Proverbs 1:7). The fool’s trouble lies in the heart and will, in a refusal to be taught. Another Hebrew word, kesil, is also used for the fool in Proverbs, and both describe the same stubbornness. A person who learns slowly but is humble and teachable is on the path of wisdom.

Discipline, correction and the limits of force

Correction is a blessing to the teachable: “whom the LORD loveth he correcteth; even as a father the son in whom he delighteth” (Proverbs 3:11–12), and a loving father disciplines his son (Proverbs 13:24). The wise man grows under it, while the scorner only hates the one who rebukes him: “rebuke a wise man, and he will love thee” (Proverbs 9:7–8). Jesus gives similar counsel when he warns against casting pearls before swine (Matthew 7:6). Jeremiah asks, “Can the Ethiopian change his skin, or the leopard his spots? then may ye also do good, that are accustomed to do evil” (Jeremiah 13:23). This proverb gives us realistic expectations. We can keep caring for people who refuse wisdom while putting our effort where it is welcomed, and entrust the rest to God in prayer.

Can a fool ever change?

Change comes from within, when a person humbles himself and turns to receive wisdom, and God’s grace brings that turning about. The hyperbole here is aimed at the attempt to force wisdom into someone from outside. Proverbs itself calls the simple to turn: “Turn you at my reproof: behold, I will pour out my spirit unto you, I will make known my words unto you” (Proverbs 1:23).

The deepest answer is in Christ. What no mortar could do, God does by giving a new heart and a new spirit (Ezekiel 36:26). Christ is “the power of God, and the wisdom of God” (1 Corinthians 1:24), “in whom are hid all the treasures of wisdom and knowledge” (Colossians 2:3). He is “the Lamb of God, which taketh away the sin of the world” (John 1:29). Through his death and resurrection he breaks the hold of sin and folly, and the foolishness that would stay in a fool under any amount of pounding departs when a heart is given to him.

Friends who sharpen and a heart that God fills

Read together, these proverbs give us a simple way to live. We do well to choose friends who will sharpen us and to be that kind of friend ourselves: honest, kind and willing to be corrected as well as to correct. Each of us has a fig tree to keep faithfully, whatever God has given us to tend, and the honour is his to give. Our dealings with others show us our own hearts, and we can bring what we find to God, who searches the heart and gives a new one.

When your eyes want more and more, remember that the grave is never full either, and turn your longing to Christ, the bread of life. When praise comes, receive it with thanks and pass the glory on to God. And when someone you love will not listen, remember that pounding never made a fool wise, and that God can still change a heart from within.

Last revised

Public-domain commentary

Matthew Henry

From his Commentary on the Whole Bible. Henry wrote on whole passages, and this entry covers Proverbs 27:17.

1662–1714 · 1 verse
Passage under commentProverbs 27:17
17Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.

This intimates both the pleasure and the advantage of conversation. One man is nobody; nor will poring upon a book in a corner accomplish a man as the reading and studying of men will. Wise and profitable discourse sharpens men's wits; and those that have ever so much knowledge may by conference have something added to them. It sharpens men's looks, and, by cheering the spirits, puts a briskness and liveliness into the countenance, and gives a man such an air as shows he is pleased himself and makes him pleasing to those about him. Good men's graces are sharpened by converse with those that are good, and bad men's lusts and passions are sharpened by converse with those that are bad, as iron is sharpened by its like, especially by the file. Men are filed, made smooth, and bright, and fit for business (who were rough, and dull, and inactive), by conversation. This is designed, 1. To recommend to us this expedient for sharpening ourselves, but with a caution to take heed whom we choose to converse with, because the influence upon us is so great either for the better or for the worse. 2. To direct us what we must have in our eye in conversation, namely to improve both others and ourselves, not to pass away time or banter one another, but to provoke one another to love and to good works and so to make one another wiser and better.

Historical interpretation

Historical reception

1 surviving comment on this verse from the historical church.

1 quote · AD 735
d. AD 735BedeEarly MedievalSourceCommentary on Proverbs
Iron sharpens iron, etc. The consultation and advice of the wise is quite good, where they instruct each other by consulting, iron sharpens iron.
Source: Quotations drawn from early Church Fathers and historical Christian theologians (AD 100–1500). Some quotes address the surrounding passage context rather than this verse alone.

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