The Church Fathers on this verse

Psalm 50 (49):18Meaning & Commentary from the Church Fathers

If thou didst see a thief thou didst run with him: and with adulterers thou hast been a partaker.

Douay-Rheims · Hebrew numbering, Septuagint numbering in brackets.

אִם־רָאִ֣יתָ גַ֭נָּב וַתִּ֣רֶץ עִמּ֑וֹ וְעִ֖ם מְנָאֲפִ֣ים חֶלְקֶֽךָ׃

Hebrew (Masoretic text)

The Church Fathers on this verse

9 Church Fathers comment on this verse

John Chrysostom

4th centuryChurch Father

It is clear that no one is entirely free from sin, as it is written, “Who can say, ‘I have made my heart clean; I am pure from my sin’?” (Proverbs 20:9). Paul himself expressed, “For I know nothing against myself, yet I am not justified by this” (1 Cor. 4:4), indicating that even those deemed righteous acknowledge their shortcomings (Proverbs 18:18). Consequently, one may wonder how, if everyone carries sin and God forbids a sinner from proclaiming His statutes, can anyone speak forth His truth? To address this question, the prophet highlights various forms of sin. He writes, “There is sin unto death” (1 Jn. 5:16), echoing Eli's words: “If someone sins against another man, the mediator can plead for him; but if a man sins against the Lord, who will intercede for him?” (1 Kings 2:25).

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Under the law, certain sins had no remedy and were punishable by death, whereas others were easily addressed. In the New Testament, Christ teaches: “If your brother sins against you, go and tell him his fault between you and him alone; if he hears you, you have gained your brother. But if he will not hear, take with you one or two more, that by the mouth of two or three witnesses every word may be established. If he refuses to hear them, tell it to the church, but if he refuses even to hear the church, let him be to you like a Gentile and a tax collector” (Matthew 18:15-17).

Further, when Peter inquired about the frequency of forgiveness—“How often shall my brother sin against me, and I forgive him?”—the response was, “Up to seventy times seven” (Matthew 18:21-22), illustrating that repentance is essential for forgiveness to be extended. Consequently, how can anyone be released if they do not acknowledge their wrongdoing or repent? Just as we candidly present our wounds to a doctor seeking healing, we must confront our sins.

The prophet articulates the nature of the sinner: “If you see a thief and are pleased to run with him, and you are partaker with an adulterer; your mouth has uttered evil, and your tongue spreads deceit. Sitting in judgment, you have slandered your brother, and laid a trap for your own mother’s son.” This portrayal of immorality reveals how vice can transform an individual, degrading their inherent dignity. It is crucial to scrutinize this depiction closely; engaging with sin through complacency is detrimental and weakens virtuous resolve. Paul warns that such approval contributes to the cycle of wrongdoing—“They not only do the same but also give hearty approval to those who practice them” (Rom. 1:32).

Even those who commit no wrongdoing may be guilty if they take pleasure in the transgressions of others. While a sinner may offer various justifications such as extreme circumstances or poverty, it is perplexing when one endorses their sinful actions. By doing so, one risks closing the channels of repentance and consolation. As onlookers to sin, we can inadvertently dull our sensitivity to our moral standing when we fail to dissent against wrongdoing. If a sinner sees indifference rather than rebuke from those who should guide them, they may think their actions are acceptable, even righteous.

Thus, those who engage in wrongdoing must bring themselves to judgment; similarly, those neglecting to do good must recognize the value of virtue, as readiness to act spurs on righteous behavior. The prophet admonishes one who condones his own sins, urging a robust rebuke. If vice is allowed to flourish unchallenged, how dire the consequences will be! This is especially true among spiritual leaders, who bear an even heavier burden. Why remain indifferent while God’s commands are trampled? Even the heavens are called to take note of such iniquities: “Be astonished, O heavens, at this, and be horribly afraid; be very desolate,” says the Lord (Jeremiah 2:12), lamenting over moral decay. Creation itself mourns for the transgressions of humanity, yet those endowed with reason often fall silent and even participate in sin.

We must acknowledge that God does not seek vengeance nor requires assistance, but desires our active involvement in upholding His decrees. When sin occurs and we fail to voice our dismay or offer reproof, we risk becoming desensitized, making ourselves more vulnerable to transgression. This complacency also hinders the sinner’s path to repentance, establishing a culture of neglect. The prophet specifically mentions those who bear witness to sin but do not act against it, highlighting the gravity of their neglect, as sin—especially of a severe nature—is overlooked.

In its seriousness, the act of adultery is underscored, for it represents a deeper moral corruption. Those who are aware of illicit acts within their congregation must take a stand—“If you know that someone is committing fornication and is partaking in the holy mysteries, inform the minister, for such unworthy hands should not partake.” This sin calls for rejection, for if one is precluded from legitimate participation due to their actions, what penalty awaits the one who violates sacred trust? Covering up another's sin equates to sharing in their guilt, as both are subject to consequences.

Those who witness wrongdoing without intervention not only risk personal culpability but become accomplices to transgression. Judges of the earthly realm punish not only for the crime committed but also hold accountable those who fail to speak out against it. Thus, we must take diligent care in opposing vice, actively working towards the redemption of ourselves and our neighbors. Paul reminds us: “Let no one seek his own, but each one the other’s well-being” (1 Cor. 10:24). In seeking the welfare of others, we safeguard our own; therefore, true compassion will not allow one to turn a blind eye to impending moral peril. It is not from a place of mere indifference that we should act but from a sincere desire to protect the sanctity of one another’s souls and bolster the community against the destructiveness of sin.

Augustine of Hippo

5th centuryChurch Father

Do not claim, ‘I am innocent of theft and have not engaged in adultery.’ Consider whether you have supported actions that please you. Did you not agree to a rather benevolent evaluation? By granting your approval, did you not relinquish your portion to an offender? For, dear friends, to support a thief and partake in the actions of an adulterer is a grave matter: even if you do not commit those acts, by endorsing them, you become complicit. The sinner revels in the desires of his heart, and the one who commits wrongdoing will be celebrated. You may refrain from evil, yet you commend those who do wrong. Is this not a significant evil? You have contributed your part alongside adulterers.

Theodoret of Cyrus

5th centuryChurch Father

The transgressions of the law are numerous and diverse, which you have the audacity to commit; as the Apostle states, "saying, 'You shall not commit adultery, you shall commit adultery'" (Rom. 2:22), making you a partner in the wrongdoing of those who engage in such acts. By silencing the truth, you have filled your mouth with falsehoods and deception; your speech is adorned with pretense. Consequently, you disregard family ties, trample upon the natural laws, undermine your fellow believers covertly, and you do not cease to slander with your words while concocting evil with your actions. In this way, He reveals their wickedness, demonstrating His patience, and also warns of the judgment He will bring upon them.

Euthymios Zigabenos

11th centuryCommentator

If you have encountered a thief, you are complicit with him. Here you have laid out before you, as if on a display, the various forms of human transgression. You, he indicates, have sinned primarily if you witnessed a thief and either participated in the theft or condoned his actions without attempting to guide him back to righteousness, instead aiding him in concealing his wrongdoing. Furthermore, you shared in the actions of the immoral. If, he continues, you engaged in the sinful acts of the immoral person, just as you did alongside the thief. The term 'immoral' here refers to anyone who lives a life of fornication and promiscuity.

Clement of Rome

1st centuryChurch Father

The Path to Salvation

Let us strive to be among those who place their hope in Him, that we might receive the gifts He has promised. How can we achieve this, dear friends? By anchoring our hearts in faith toward God; by pursuing what is pleasing and acceptable in His sight; by acting in accordance with His sacred will, walking in the path of truth while rejecting all forms of unrighteousness and sin, including greed, conflict, malice, deceit, gossip, and slander, as well as wickedness, arrogance, ostentation, vanity, and lack of hospitality. Those who engage in such actions are detestable to God, not only those who commit them but also those who condone them. The Scriptures declare: But God said to the sinner, ‘Why do you declare My statutes and profess My covenant with your mouth?

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For you have despised instruction and turned back My words: when you saw a thief, you hurried to join him, and you have associated with an adulterer. Your mouth has multiplied evil speech, and your tongue has spun deceit. In your sitting, you have slandered your brother, and you have laid temptation upon your mother’s son. You have done this, and I have remained silent; you have imagined iniquity, as if I would be like you. I will rebuke you and present you before your own eyes. Consider this, therefore, you who forget God, lest He become angry, and there be no one to save. A sacrifice of praise will glorify Me, and this is how I will reveal My salvation to him.

Cyprian of Carthage

3rd centuryChurch Father

When you declare the truth and commandments of the Lord but fail to embody the actions of Christ, you effectively dismiss His words and disregard His teachings, engaging in spiritual corruption rather than physical theft. It becomes clear that one who appropriates the words and actions of our Lord from the gospel distorts and violates God's commandments.

Tichon of Zadonsk

18th centuryChurch Father

When an individual is called to the court, they are evaluated by those presiding over the proceedings, confronted by witnesses, and admonished by the judges. They must face allegations of misdeeds, infractions of laws, and various breaches. Similarly, the unfortunate sinner who has not sought forgiveness through repentance, upon being summoned to this divine tribunal, will stand before God and be held accountable. Their transgressions will be displayed, and the Just Judge will deliver this solemn admonition: “Thou hast despised correction and rejected My words. When you observed a thief, you joined him, and you associated with an adulterer. Your lips have multiplied slander, and your tongue has crafted deceit... You have caused your brother to stumble” (Psalm 49:17-20).

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Again, it is written, “I was hungry, and you gave me no food; I was thirsty, and you gave me nothing to drink; I was a stranger, and you did not welcome me; I was naked, and you did not clothe me; I was sick and imprisoned, and you did not visit me” (Matthew 25:42-43). Thus, the sacred truths of Scripture will manifest in the sinner’s life, as it is declared, “I will rebuke thee, and set thy sins before thee” (Psalm 49:21).

Those standing in judgment will be overwhelmed by shame and dread. Therefore, sinners will experience profound embarrassment, fear, and trepidation at the judgement. They will be reproached by God Himself, whom they failed to honor, held accountable for the ingratitude they displayed, and will face this rebuke before all creation. A lawbreaker brought before the court is rejected from the community of good citizens, perceived as a wrongdoer rather than a rightful member of society. In a similar manner, Christians who violate God’s commandments without genuine repentance will be cast out from the assembly of the faithful at that holy judgement, separated like goats from the sheep, marked as unfaithful, false, and not true followers of Christ. Just as a lawbreaker may face death or another punishment as dictated by law, so too will sinners be sentenced to eternal punishment at that final judgement. “Depart from Me, ye cursed, into everlasting fire prepared for the devil and his angels” (Matthew 25:41).

A condemned individual faces execution with deep sorrow, cut off from their family and friends, lamenting their fate. Likewise, sinners condemned to eternal punishment will be alienated from God, His holy angels, and His chosen ones, forever separated while enduring inconsolable weeping, fear, terror, and profound despair as they enter eternal suffering. “And these shall go into everlasting torment” (Matthew 25:46).

Oh, poor sinner! Repent and cleanse your heart with genuine remorse and tears, that you might escape these horrific realities. Lord, grant mercy to Your creation! “Have mercy on me, O God, according to Thy great mercy, and according to the multitude of Thy bounties, cleanse my iniquity. Turn away Thy face from my sins, and cleanse all my iniquities” (Psalm 50:3, 11). “But if Thou, O Lord, shouldst mark iniquities, O Lord, who could stand?” (Psalm 130:3). Turn Thy face away from my sins, O Lord, and direct Thy gaze towards Christ, my Savior, Jesus Christ, Thy only begotten Son, who, for me, an unworthy and wretched sinner, suffered and died, offering Himself as a sacrifice, a sweet-smelling aroma before You, my heavenly Father. By His grace and humanity, pour out Your mercy upon me, and cleanse all my iniquities through His blood, which was shed for my sake. Amen.

Irenaeus (Klementjewsky)

18th centuryCommentator

Through these statements, the Prophet illustrates that the neglect and disdain for God's commandments lead to active transgressions, specifically the sins of theft and adultery. Since these two offenses are quite common, stemming from a heart of greed, he focuses solely on these examples, declaring, “If thou hast seen a thief, thou shalt flow with him, and with an adulterer thou shalt partake of him.” He does not say, “Thou didst steal,” or “Thou didst commit adultery,” but rather highlights that you chose to associate with thieves and share in the deeds of adulterers.

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This indicates that to steal or engage in adultery, while serious and without justification, is less grave than willingly joining together with thieves and partaking in the actions of adulterers; for the former frequently occurs in secrecy, driven by lust, while the latter reveals a more depraved will that surpasses mere desire or need.

Psalter with Commentaries (Cave Monastery in Kiew)

19th centuryCommentator

This psalm was inspired by the Holy Spirit through David and entrusted to Asaph, the leader of his musicians, for performance. The prophet prophesies about the second coming of Christ, describing it as awe-inspiring and unbearable. A river of fire emerges before Him; this vision was once seen by the prophet Daniel when he contemplated this extraordinary event. His throne is described as a burning flame, and His wheels are like a blazing fire (Dan. 7:9-10). Here, the prophet highlights that profound humiliation to which all beings in heaven and on earth should gather in vast multitudes to openly condemn both overt and hidden wickedness.

Cross references

Passages read together with this verse.