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Psalm 19:12

“Prayer for Purity and Acceptance”Psalm 19:12–14

King James Version
Who can understand his errors? cleanse thou me from secret faults.

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

KJV (with Strong's)
Who can understand H995 his errors H7691? cleanse H5352 thou me from secret H5641 faults.

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

Berean Standard Bible
Who can discern his own errors? Cleanse me from my hidden faults.

Bible text: Berean Standard Bible · Public domain

American Standard Version
Who can discern his errors? Clear thou me from hidden faults.

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

World English Bible Messianic
Who can discern his errors? Forgive me from hidden errors.

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

Geneva Bible (1599)
Who can vnderstand his faultes? clense me from secret fautes.

Bible text: Geneva Bible (1599) · Public domain

Young's Literal Translation
Errors! who doth understand? From hidden ones declare me innocent,

Bible text: Young's Literal Translation · Public domain

King James Version — Interlinear
5 Hebrew words
  1. שְׁגִיאוֹתshe·gi·'oterrorsH7691N-fpNoun Plural Feminine Absolute
  2. מִיmiwho?H4310InterrogPronoun Interrogative
  3. יָבִיןya·Vinwill he discernH995V-Qal-Imperf-3msVerb Qal Imperfect 3rd Singular Masculine
  4. מִנִּסְתָּרוֹתmi·nis·ta·Rotfrom hidden [sins]H5641Prep-m ¦ V-Niphal-Prtcpl-fpVerb Niphal Participle Plural Feminine Absoluteמִfromנִּסְתָּרוֹתhidden [sins]
  5. נַקֵּנִיna·Ke·niacquit meH5352V-Piel-Imp-2ms ¦ 1csVerb Piel Imperative 2nd Singular Masculineנַקֵּacquitנִיme
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.

Translation
Details
In the KJVVerse 14,181 of 31,102 · 45.6%

Study this verse

Written with AI assistance. Always check it against Scripture.

This verse

Since no one can fully see his own wrongdoing, David asks God to cleanse him from faults that are hidden even from himself.

“Who can understand his errors?”

A question with no answer expected. The errors, shᵉgîyʼâh, are sins of ignorance or oversight, and the KJV supplies “his”. The question flows from the perfect law of the verses before it, which shows up what we had missed.

“cleanse thou me”

One Hebrew word, naqqenî, from nâqâh: make me clean, and hold me innocent. It is a plea to God, who alone can reach sins we cannot see.

“from secret faults.”

Things hidden, nistārôt, from çâthar, here chiefly hidden from David himself. “Faults” is supplied by the KJV.

Passage studyPsalm 19:12–14

Cleanse Me, Keep Me, Accept My Words

12Who can understand his errors? cleanse thou me from secret faults. 13Keep back thy servant also from presumptuous sins; let them not have dominion over me: then shall I be upright, and I shall be innocent from the great transgression. 14Let the words of my mouth, and the meditation of my heart, be acceptable in thy sight, O LORD, my strength, and my redeemer.

Summary

Psalm 19 has praised God’s glory in the heavens and the perfection of his law, and in its last three verses David turns from what God has shown him to his own heart. He asks God to cleanse him from faults hidden even from himself, to hold him back from proud and deliberate sins so that they never gain the rule over him, and to accept both the words he speaks and the thoughts he keeps within. He closes by calling the LORD his strength, a word that means his rock, and his redeemer, the near kinsman who sets him free. The prayer moves from sins he is unaware of, to sins done with open eyes, to the whole person offered to God.

How the psalm leads to this prayer

Psalm 19, which its heading gives to David, has two great movements before these verses, though it names no occasion for its writing. Verses 1 to 6 tell how “the heavens declare the glory of God” (Psalm 19:1) and follow the sun on its circuit across the sky. This is God making himself known through creation to all people, often called general revelation. Verses 7 to 11 (Psalm 19:7) then praise the law of the LORD as perfect, sure, right and pure. It restores the soul, makes wise the simple, rejoices the heart and enlightens the eyes, and it is more to be desired than fine gold and sweeter than honey. This is his special revelation, God making known his character and will through his word. The last of those verses adds that the law warns God’s servant and rewards those who keep it (Psalm 19:11).

A man who has just looked closely at a perfect law sees his own imperfection more clearly, and so the praise turns into confession and request. That is how it goes with us too. The nearer we come to God’s holiness, in his works and in his word, the more we see our need of his cleansing. The contrast between the flawless law of verses 7 to 11 and the hidden sin of verse 12 magnifies God’s holiness and our need of his grace.

Faults we cannot see (Psalm 19:12)

“Who can understand his errors?” is a question that expects no answer, because nobody can grasp the full extent of his own wrongdoing. The word for errors, shᵉgîyʼâh, comes from the root shâgâh and means a moral mistake, a sin committed through ignorance, oversight or inadvertence. This noun occurs only here in the Old Testament. The KJV supplies the word “his” to complete the sense.

Israel’s law already knew about such sins. Leviticus 4 set out the offerings for a soul that “shall sin through ignorance against any of the commandments of the LORD” (Leviticus 4:2). A person could break God’s commands without meaning to, and that sin still needed atonement. David’s prayer reaches past outward keeping of the law to a longing for purity within, and it reckons honestly with a heart that can deceive itself. As Jeremiah says, “The heart is deceitful above all things, and desperately wicked: who can know it?” (Jeremiah 17:9).

What are “secret faults”?

Secret faults are sins that lie hidden. The Hebrew nistārôt comes from çâthar, which means to hide or conceal, and in this form it can mean simply things that are hidden, with no thought of anyone deliberately hiding them. Some such sins may be hidden from other people, but coming straight after “Who can understand his errors?” the sense is sins hidden from the psalmist himself. They are mistakes he never noticed, ingrained habits, attitudes and patterns of thought that are contrary to God’s holy character and lie below the surface of what he knows about himself. The KJV supplies “faults” to make the meaning plain.

What is hidden from us is open to God. Moses prays, “Thou hast set our iniquities before thee, our secret sins in the light of thy countenance” (Psalm 90:8), and Hebrews says, “Neither is there any creature that is not manifest in his sight” (Hebrews 4:13). So the right thing to do with faults we cannot find is to bring them to the One who sees them all.

Cleanse thou me

“Cleanse thou me” is one word in Hebrew, naqqenî, a command form of the verb nâqâh. It means to be clean or to make clean, and it also means to be acquitted or held innocent. David asks God both to purify him and to clear him of guilt, which only God can do for sins that David cannot even name. The same verb returns in verse 13 as “I shall be innocent”. John gives us the promise that answers this prayer: “If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness” (1 John 1:9). Prayed this way, looking into our own hearts becomes an act of trust in God’s ongoing work of making us holy, and it stays clear of anxious, morbid self-examination.

Kept back from presumptuous sins (Psalm 19:13)

The word “also” joins this verse to the one before. Having asked to be cleansed from hidden faults, David now asks to be guarded from the opposite kind of sin, the kind done with open eyes. The word for presumptuous, zêd, carries the sense of arrogance and insolence. Presumptuous sins are committed on purpose, knowing God’s command and setting it aside. They grow out of pride, the attitude that presumes to know better than God or to stand above his law.

The law called this sinning “presumptuously”, and it treated it with the utmost seriousness: “But the soul that doeth ought presumptuously, whether he be born in the land, or a stranger, the same reproacheth the LORD; and that soul shall be cut off from among his people” (Numbers 15:30). Unintentional sins had prescribed offerings that brought reconciliation, while this high-handed defiance of a known command carried the penalty of being cut off (Numbers 15:30–31). David lived under that law and knew how grave such sin is. It is an affront to God’s rule and holiness, and it threatens a man’s standing with the LORD and with his people.

“Keep back thy servant” asks for God’s own hand to restrain him. David is a king and a man after God’s own heart, and still he knows that he is capable of deliberate rebellion, so he asks God to hold him back from that road. True integrity is God’s gift and his continuing work in us.

Proud sins or proud men?

The word zêd is an adjective, used elsewhere of people, as in “Thou hast rebuked the proud that are cursed” (Psalm 119:21), and the KJV supplies the word “sins” here. Believers differ on how to read it. Many take it as the KJV does, of the arrogant sins themselves (in the plural, zêdîym), which suits the move from secret faults in verse 12. Others read the prayer as asking to be kept back from proud men, and that also fits the next words, “let them not have dominion over me”. On either reading David asks God to shield him from the power of pride.

Let them not have dominion over me

The verb mâshal means to rule. David asks that deliberate sin should never become the ruling power in his life. A willful act left unchecked can harden into a habit, and the habit into a master that shapes a man’s choices and character and draws him away from God. Another psalm prays in the same words, “Order my steps in thy word: and let not any iniquity have dominion over me” (Psalm 119:133). Paul takes up the same hope for believers: “Let not sin therefore reign in your mortal body” (Romans 6:12–14), and “sin shall not have dominion over you: for ye are not under the law, but under grace” (Romans 6:14). The freedom David longs for is freedom from sin’s rule so that God’s will governs his thoughts, desires and actions.

Upright, and innocent from the great transgression

“Then” introduces what God’s keeping will bring about. “I shall be upright” translates a form of tâmam, which speaks of being whole, complete and blameless, sincere and wholehearted before God. The verb shares its root with tâmîym, the word the psalm used for the law itself: “The law of the LORD is perfect” (Psalm 19:7). The perfect law describes the life God makes whole in the man he keeps.

“Innocent” is nâqâh again, the verb of “cleanse thou me” in verse 12. To be innocent is to be clean and clear of guilt and of what guilt brings. The word for transgression, peshaʻ, means rebellion, an act by which someone defies an authority, and by extension the guilt or punishment that follows. Joined to rab, which means much, many or great, peshaʻ rab is “the great transgression”, rebellion against God at its gravest.

Believers understand the great transgression in two ways. Many take it as the presumptuous sin itself, called great because the law provided no sacrifice for it (Numbers 15:30–31). Others read it as a settled state of high-handed defiance that ends in a final break with God, like being cut off from his people. It can name a single grievous sin such as murder, idolatry or turning away from God, or a hardened life of rebellion. Hebrews gives the New Testament warning: “For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins” (Hebrews 10:26–27).

So the two verses climb from secret faults, to presumptuous sins, to the great transgression, each graver than the last. David asks God to guard him at every step.

Words and thoughts offered to the LORD (Psalm 19:14)

The psalm ends with a prayer that covers the whole person. “The words of my mouth” are ʼêmer, something said, a word or speech. “The meditation of my heart” is higgâyôwn, deep thought or musing, a word linked with a low, murmuring sound. In Hebrew thought the heart is the seat of mind, will and feeling, the centre of the person. Mouth and heart together stand for the outward life that others hear and the inward life that only God sees, and David brings both to God at once.

The two belong together because words come from the heart. Jesus said, “for out of the abundance of the heart the mouth speaketh” (Matthew 12:34), and he goes on in that passage to speak of the weight of our words (Matthew 12:34–37). Proverbs says, “Keep thy heart with all diligence; for out of it are the issues of life” (Proverbs 4:23), and Paul tells believers what to think on: whatever is true, honest, just, pure, lovely and of good report (Philippians 4:8).

Acceptable in thy sight

“Acceptable” is râtsôwn, delight, pleasure or favour. It is the word used of an offering that God receives with favour, as in Leviticus 22:20, so David is bringing his words and his thoughts to God as an offering. He wants them to please God and bring him delight. Israel’s prophets taught that God’s acceptance always looked past the ritual to the heart and the life, as Samuel told Saul: “Behold, to obey is better than sacrifice” (1 Samuel 15:22).

“In thy sight” names the audience whose approval David seeks, and it reminds us that God sees everything, including the thoughts and motives that no one else can see. “The LORD looketh on the heart” (1 Samuel 16:7). That brings the prayer back to the secret faults of verse 12. The God who sees what is hidden in us is the God whose favour David asks for. For our words and thoughts to be acceptable, they must agree with his perfect holiness, and he delights in a people who walk with him in that way.

O LORD, my strength, and my redeemer

David addresses God by his covenant name, Yᵉhôvâh, the LORD who has bound himself to his people. “My strength” is tsûwr, a rock, and the KJV gives its sense. The LORD is the firm, reliable and sheltering foundation that David stands on, and the power that holds him against temptation.

“My redeemer” uses the verb gâʼal, and the one who does it is the go’el, the kinsman-redeemer. In Israel he was a close relative who was bound by law and duty to rescue a family member in distress, buying him back from slavery or debt and avenging an unjust death. God took this part for his people when he brought them out of Egypt: “I will redeem you with a stretched out arm, and with great judgments” (Exodus 6:6).

The title fits the end of this psalm. David has confessed hidden faults and asked to be kept from willful sin, and he admits that he cannot meet God’s holy standard by himself. So he calls on God as the near kinsman who frees him from the bondage of sin and its consequences, forgives and restores him. The acceptance he asks for in this verse comes by God’s redemption and God’s strength, as a gift of grace.

The cleansing David prayed for, given in Christ

Jesus is the perfect revelation of God’s glory and the one man who kept God’s law perfectly. He was “in all points tempted like as we are, yet without sin” (Hebrews 4:15), free of every sin, known and unknown, willful and unintended. He never once set himself against his Father’s will, and “became obedient unto death, even the death of the cross” (Philippians 2:8). He came to “fulfil all righteousness” (Matthew 3:15). As the Word made flesh (John 1:14), his every word and every thought was acceptable in God’s sight.

What David asked for, Christ provides. He is “the Lamb of God, which taketh away the sin of the world” (John 1:29), and he bore on the cross the whole weight of our sin, including the hidden faults we never knew we had. “The blood of Jesus Christ his Son cleanseth us from all sin” (1 John 1:7). Sin’s dominion is broken for those who are in him (Romans 6:14). We are made upright and innocent in God’s sight by his righteousness given to us, for God “hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him” (2 Corinthians 5:21).

He is also our strength and our redeemer. The Holy Spirit he gives lives in believers, so that the righteousness of the law is fulfilled in us “who walk not after the flesh, but after the Spirit” (Romans 8:4), and we can say with Paul, “I can do all things through Christ which strengtheneth me” (Philippians 4:13). In him “we have redemption through his blood, even the forgiveness of sins” (Colossians 1:13–14, Ephesians 1:7). David asked God to keep his servant back, and Jude praises the One who is “able to keep you from falling” and to present us blameless before his presence (Jude 1:24). So David’s prayer becomes ours, prayed in Christ’s name and resting on his merit.

Praying David’s prayer as our own

These three verses give us words for a lifelong walk with God. We can ask him to search out and cleanse the faults we cannot see, and leave them with him in confidence that he forgives. We can ask him, day by day, to hold us back from pride and from the deliberate sins that would gladly become our masters. And we can offer him our speech and our private thoughts as a gift, the conversations and the musings alike, asking that they please him.

All of it rests on the names David gives God at the end. The LORD is our rock when we are weak, and our redeemer when we have failed. Our growth in holiness is his work from first to last, and the purity David longed for is a purity God himself gives.

Last revised

Public-domain commentary

Matthew Henry

From his Commentary on the Whole Bible. Henry wrote on whole passages, and this entry covers Psalm 19:7–14. He set out his notes in a three-level outline, kept here as he numbered it.

1662–1714 · 8 verses
Passage under commentPsalm 19:7–14
I. II. Main points1. 2. Sub-points(1.) (2.) Details

God's glory, (that is, his goodness to man) appears much in the works of creation, but much more in and by divine revelation. The holy scripture, as it is a rule both of our duty to God and of our expectation from him, is of much greater use and benefit to us than day or night, than the air we breathe in, or the light of the sun. The discoveries made of God by his works might have served if man had retained his integrity; but, to recover him out of his fallen state, another course must be taken; that must be done by the word of God. And here,

1.The psalmist gives an account of the excellent properties and uses of the word of God, in six sentences (Psalm 19:7-9), in each of which the name Jehovah is repeated, and no vain repetition, for the law has its authority and all its excellency from the law-maker. Here are six several titles of the word of God, to take in the whole of divine revelation, precepts and promises, and especially the gospel. Here are several good properties of it, which proves its divine original, which recommend it to our affection, and which extol it above all other laws whatsoever. Here are several good effects of the law upon the minds of men, which show what it is designed for, what use we are to make of it, and how wonderful the efficacy of divine grace is, going along with it, and working by it. 1. The law of the Lord is perfect. It is perfectly free from all corruption, perfectly filled with all good, and perfectly fitted for the end for which it is designed; and it will make the man of God perfect, 2 Timothy 3:17. Nothing is to be added to it nor taken from it. It is of use to convert the soul, to bring us back to ourselves, to our God, to our duty; for it shows us our sinfulness and misery in our departures from God and the indispensable necessity of our return to him. 2. The testimony of the Lord (which witnesses for him to us) is sure, incontestably and inviolably sure, what we may give credit to, may rely upon, and may be confident it will not deceive us. It is a sure discovery of the divine truth, a sure direction in the way of duty. It is a sure foundation of living comforts and a sure foundation of lasting hopes. It is of use to make us wise, wise to salvation, 2 Timothy 3:15. It will give us an insight into things divine and a foresight of things to come. It will employ us in the best work and secure to us our true interests. It will make even the simple (poor contrivers as they may be for the present world) wise for their souls and eternity. Those that are humbly simple, sensible of their own folly and willing to be taught, shall be made wise by the word of God, Psalm 25:9. 3. The statutes of the Lord (enacted by his authority, and binding on all wherever they come) are right, exactly agreeing with the eternal rules and principles of good and evil, that is, with the right reason of man and the right counsels of God. All God's precepts, concerning all things, are right (Psalm 119:128), just as they should be; and they will set us to rights if we receive them and submit to them; and, because they are right, they rejoice the heart. The law, as we see it in the hands of Christ, gives cause for joy; and, when it is written in our hearts, it lays a foundation for everlasting joy, by restoring us to our right mind. 4. The commandment of the Lord is pure; it is clear, without darkness; it is clean, without dross and defilement. It is itself purified from all alloy, and is purifying to those that receive and embrace it. It is the ordinary means which the Spirit uses in enlightening the eyes; it brings us to a sight and sense of our sin and misery, and directs us in the way of duty. 5. The fear of the Lord (true religion and godliness prescribed in the word, reigning in the heart, and practised in the life) is clean, clean itself, and will make us clean (John 15:3); it will cleanse our way, Psalm 119:9. And it endureth for ever; it is of perpetual obligation and can never be repealed. The ceremonial law is long since done away, but the law concerning the fear of God is ever the same. Time will not alter the nature of moral good and evil. 6. The judgments of the Lord (all his precepts, which are framed in infinite wisdom) are true; they are grounded upon the most sacred and unquestionable truths; they are righteous, all consonant to natural equity; and they are so altogether: there is no unrighteousness in any of them, but they are all of a piece.

II.He expresses the great value he had for the word of God, and the great advantage he had, and hoped to have, from it, Psalm 19:10, Psalm 19:11.

1.See how highly he prized the commandments of God. It is the character of all good people that they prefer their religion and the word of God,

(1.)Far before all the wealth of the world. It is more desirable than gold, than fine gold, than much fine gold. Gold is of the earth, earthly; but grace is the image of the heavenly. Gold is only for the body and the concerns of time; but grace is for the soul and the concerns of eternity.

(2.)Far before all pleasures and delights of sense. The word of God, received by faith, is sweet to the soul, sweeter than honey and the honey comb. The pleasures of sense are the delight of brutes, and therefore debase the great soul of man; the pleasures of religion are the delight of angels, and exalt the soul. The pleasures of sense are deceitful, will soon surfeit, and yet never satisfy; but those of religion are substantial and satisfying, and there is no danger of exceeding in them.

2.See what use he made of the precepts of God's word: By them is thy servant warned. The word of God is a word of warning to the children of men; it warns us of the duty we are to do, the dangers we are to avoid, and the deluge we are to prepare for, Ezekiel 3:17; Ezekiel 33:7. It warns the wicked not to go on in his wicked way, and warns the righteous not to turn from his good way. All that are indeed God's servants take this warning.

3.See what advantage he promised himself by his obedience to God's precepts: In keeping them there is great reward. Those who make conscience of their duty will not only be no losers by it, but unspeakable gainers. There is a reward, not only after keeping, but in keeping, God's commandments, a present great reward of obedience. Religion is health and honour; it is peace and pleasure; it will make our comforts sweet and our crosses easy, life truly valuable and death itself truly desirable.

III.He draws some good inferences from this pious meditation upon the excellency of the word of God.

Such thoughts as these should excite in us devout affections, and they are to good purpose.

1.He takes occasion hence to make a penitent reflection upon his sins; for by the law is the knowledge of sin. "Is the commandment thus holy, just, and good? Then who can understand his errors? I cannot, whoever can." From the rectitude of the divine law he learns to call his sins his errors. If the commandment be true and righteous, every transgressions of the commandment is an error, as grounded upon a mistake; every wicked practice takes rise from some corrupt principle; it is a deviation from the rule we are to work by, the way we are to walk in. From the extent, the strictness, and spiritual nature, of the divine law he learns that his sins are so many that he cannot understand the number of them, and so exceedingly sinful that he cannot understand the heinousness and malignity of them. We are guilty of many sins which, through our carelessness and partiality to ourselves, we are not aware of; many we have been guilty of which we have forgotten; so that, when we have been ever so particular in the confession of sin, we must conclude with an et cetera - and such like; for God knows a great deal more evil of us than we do of ourselves. In many things we all offend, and who can tell how often he offends? It is well that we are under grace, and not under the law, else we were undone.

2.He takes occasion hence to pray against sin. All the discoveries of sin made to us by the law should drive us to the throne of grace, there to pray, as David does here,

(1.)For mercy to pardon. Finding himself unable to specify all the particulars of his transgressions, he cries out, Lord, cleanse me from my secret faults; not secret to God, so none are, nor only such as were secret to the world, but such as were hidden from his own observation of himself. The best of men have reason to suspect themselves guilty of many secret faults, and to pray to God to cleanse them from that guilt and not to lay it to their charge; for even our sins of infirmity and inadvertency, and our secret sins, would be our ruin if God should deal with us according to the desert of them. Even secret faults are defiling, and render us unfit for communion with God; but, when they are pardoned, we are cleansed from them, 1 John 1:7.

(2.)For grace to help in time of need. Having prayed that his sins of infirmity might be pardoned, he prays that presumptuous sins might be prevented, Psalm 19:13. All that truly repent of their sins, and have them pardoned, are in care not to relapse into sin, nor to return again to folly, as appears by their prayers, which concur with David's here, where observe, [1.] His petition: "Keep me from ever being guilty of a wilful presumptuous sin." We ought to pray that we may be kept from sins of infirmity, but especially from presumptuous sins, which most offend God and wound conscience, which wither our comforts and shock our hopes. "However, let none such have dominion over me, let me not be at the command of any such sin, nor be enslaved by it." [2.] His plea: "So shall I be upright; I shall appear upright; I shall preserve the evidence and comfort of my uprightness; and I shall be innocent from the great transgression;" so he calls a presumptuous sin, because no sacrifice was accepted for it, Numbers 15:28-30. Note, First, Presumptuous sins are very heinous and dangerous. those that sin against the habitual convictions and actual admonitions of their consciences, in contempt and defiance of the law and its sanctions, that sin with a high hand, sin presumptuously, and it is a great transgression. Secondly, Even good men ought to be jealous of themselves, and afraid of sinning presumptuously, yea, though through the grace of God they have hitherto been kept from them. Let none be high-minded, but fear. Thirdly, Being so much exposed, we have great need to pray to God, when we are pushing forward towards a presumptuous sin, to keep us back from it, either by his providence preventing the temptation or by his grace giving us victory over it.

3.He takes occasion humbly to beg the divine acceptance of those his pious thoughts and affections, Psalm 19:14. Observe the connexion of this with what goes before. He prays to God to keep him from sin, and then begs he would accept his performances; for, if we favour our sins, we cannot expect God should favour us or our services, Psalm 66:18. Observe,

(1.)What his services were - the words of his mouth and the meditations of his heart, his holy affections offered up to God. The pious meditations of the heart must not be smothered, but expressed in the words of our mouth, for God's glory and the edification of others; and the words of our mouth in prayer and praise must not be formal, but arising from the meditation of the heart, Psalm 45:1.

(2.)What was his care concerning these services - that they might be acceptable with God; for, if our services be not acceptable to God, what do they avail us? Gracious souls must have all they aim at if they be accepted of God, for that is their bliss.

(3.)What encouragement he had to hope for this, because God was his strength and his redeemer. If we seek assistance from God as our strength in our religious duties, we may hope to find acceptance with God in the discharge of our duties; for by his strength we have power with him.

In singing this we should get our hearts much affected with the excellency of the word of God and delivered into it, we should be much affected with the evil of sin, the danger we are in of it and the danger we are in by it, and we should fetch in help from heaven against it.

Historical interpretation

Two Centuries of Reception

9 surviving comments on this verse. Each one is dated, so this reads as a timeline rather than a list.

9 quotes · AD 390–585
Post-NiceneEarly Medieval
400500600

Select a marker to jump to its quote. Markers stagger vertically where authors wrote within a few decades of each other.

d. AD 390Diodorus of TarsusPost-NiceneSourceCOMMENTARY ON PSALM 19
Having given instruction in regard to devotion, at this point he proceeds to speak of the sins in respect of human beings and puts people on the alert so as to realize what is an involuntary sin and what voluntary, and how they differ from each other, and further into how many types involuntary sin is divided. He employs an admirable division, first dividing sin into two, voluntary and involuntary. After this he divides the involuntary sin into three, since for example we fall when compelled, or through weakness or when mislead; or we do something when an incident occurs that is more influential than good intentions, or we prove too weak to overcome the power of lust and fall into sin, or in many cases we make a judgment with the best of intentions but by some deception we are inveigled into doing the opposite.
d. AD 395Gregory of NyssaPost-NiceneSourceON THE CHRISTIAN MODE OF LIFE
So wicked and hard to cure and strong are those things possessed in the depths of our souls that it is not possible to rub them out and to remove them through human efforts and virtue alone unless through prayer we take the power of the Spirit as an ally and, in this way, conquer the evil that is playing the tyrant within us, as the Spirit teaches us through the voice of David: “Cleanse me from my unknown faults.”
d. AD 420JeromePost-NiceneSourceHOMILY ON PSALM 114[116A]
It is not my will to conceive sin; I do not want to entertain bad thoughts, and yet I do; I do not want to entertain evil, and, like a captive against my will, I am drawn into evil reflections. Because it is not in my power either to think or not to think evil, that is why I declare, “Surely they are wanton sins that come into my heart,” but since I cannot seem to avoid them, I plead, “Cleanse me from my unknown faults.” Unprovoked they come, but because I harbor them, I beg the Lord, “From wanton sin especially restrain your servant.” Why am I saying all this? Because the prophet said, “I shall please the Lord”; not “I please” but “I shall please,” for no matter how much I strive here, I cannot be a perfect man, a just man. Consequently, the apostle also says, “We know in part, and we prophesy in part,” and “We see now through a mirror in an obscure manner.”
"Who understands sins?" [Psalm 19:12.] But what sort of sweetness can there be in sins, where there is no understanding? For who can understand sins, which close the very eye, to which truth is pleasant, to which the judgments of God are desirable and sweet? Yea, as darkness closes the eye, so do sins the mind, and suffer it not to see either the light, or itself.
d. AD 430Augustine of HippoPost-NiceneSourceON THE PERFECTION OF HUMAN RIGHTEOUSNESS 14:33
However great a person’s righteousness may be, he ought to reflect and think, lest there should be found something blameworthy that has escaped indeed his own notice, when that righteous King shall sit on his throne, whose cognizance no sins can possibly escape, not even those of which it is said, “Who understands his transgressions?” “When, therefore, the righteous King shall sit on his throne, who will boast that he has a pure heart? Or who will boldly say that he is pure from sin?” Except perhaps those who wish to boast of their own righteousness and not glory in the mercy of the Judge.
d. AD 430Augustine of HippoPost-NiceneSourceSERMON 2:3
You must know then, dearly beloved, that God’s testing is not aimed at his getting to know something he was ignorant of before but at bringing to light what was hidden in a person, by means of a test, which is a kind of interrogation. People are not as well known to themselves as they are to their Creator, nor do the sick know themselves as well as the doctor does. A person is sick; he is suffering, the doctor is not suffering, and the patient is waiting to hear what he is suffering from from the one who is not suffering. That is why a man cries out in a psalm, “From my hidden ones cleanse me, O Lord.” There are things in a person that are hidden from the person in whom they are. And they will not come out, or be opened up or discovered, except through tests and trials and temptations. If God stops testing, it means the master has stopped teaching.
d. AD 461Leo the GreatPost-NiceneSourceSERMON 44:1
Although in any time there are many who lead an innocent life, and very many commend themselves to God by their habitual performance of good deeds, we should not however trust in the integrity of our conscience to such a point that we think that human weakness, living among scandals and temptations, can meet nothing that will harm it. The chief of prophets says, “Who will boast that they have pure hearts or that they are cleansed from sin?” [Here in this psalm] he says, “From my hidden faults cleanse me, O Lord, and from dangerous ones spare your servant.”
d. AD 542Caesarius of ArlesPost-NiceneSourceSERMON 234:4
Very often sins creep up on us through thoughts or desires or speech or action, as the result of necessity, through weakness or out of forgetfulness. If a person thinks only of serious sins and strives to resist only these but has little or no care about small sins, he incurs no less danger than if he committed more serious offenses. Therefore let us not think little of our sins because they are slight, but let us fear them because they are many. Drops of rain are small, but because they are very many, they fill rivers and submerge houses, and sometimes by their force they even carry off mountains. Concerning these it is written: “He who scorns little things will fall little by little”; and again: “Who can detect failings?” Who is there who guards his heart with such great vigilance that no idle word ever proceeds from his lips? However, an account must be rendered for this on the day of judgment. Who is there who does not lie?… Who is there from whose mouth an evil word does not sometimes issue?… Who could even count the sins that we consider small or almost nonexistent, even though sacred Scripture testifies that we are going to be severely punished for them? For this reason, with God’s help and in accord with the text of Solomon, [“The just person falls seven times in a day and rises again,”] let us keep our hearts with all watchfulness.
d. AD 585CassiodorusPost-NiceneSourceExplanation of the Psalms 19:13
Although there are three ways to transgress through human errors—by thought, word and deed, by condensing that boundless sea of transgressions into an abbreviated form—he testifies that transgression flows from two sources. Hidden sin is what is termed “original,” in which we are conceived, born and sin with a secret desire. This happens when we covet the property of our neighbor, or desire to carry out vengeance on our enemies, or want to become more prominent than others, or seek more palatable food or similar desires which swell and steal on us in such a way that they escape the notice of many people before they take effect. If these sins do not become known to anyone, … we must still realize that there are many sins of which we are completely unaware, whose origins and deceptions we are not able to perceive. Therefore the text ought to be understood to refer to all sins when it says “Who can understand his sins?”
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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