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Catholic Commentary
The Moral Blindness of the Unjust
5They don’t know, neither do they understand.
Psalms 82:5 describes the spiritual and moral blindness of unjust rulers who have severed their relational connection to God. The Hebrew word "yada" (know) signals not intellectual ignorance but estrangement from divine wisdom, making their injustice the cause rather than the effect of their inability to discern right from wrong.
The unjust rulers don't fail because they lack information—they fail because they have deliberately chosen not to see the face of God in the vulnerable.
Typologically, this verse anticipates the condemnation of all those who, having received a share in divine authority — whether as parents, priests, judges, or kings — have used it to serve themselves rather than the poor and the voiceless. The blindness described here prefigures what the New Testament will call the "hardened heart" (sklerkardia), the condition that prevents one from receiving the Word of God (cf. Mark 3:5).
Catholic tradition reads Psalm 82:5 as an anatomy of moral sin that goes to the heart of the human condition after the Fall. The Catechism of the Catholic Church teaches that sin "darkens the intellect and weakens the will" (CCC 1707), and this verse is a poetic dramatization of that very reality. The "not knowing" and "not understanding" of the unjust judges is the scriptural face of what the Catechism calls "moral blindness" — a culpable darkening of conscience that results from repeated acts of injustice.
St. Augustine, in his Enarrationes in Psalmos, interprets the "gods" of Psalm 82 as those who have received grace but failed to live by it. Their ignorance, he argues, is a poena peccati — a punishment of sin — as well as a disposition toward further sin. They do not know because they have chosen not to know, and this willful ignorance compounds their guilt.
St. Thomas Aquinas, drawing on this Augustinian tradition, distinguishes between ignorantia invincibilis (invincible ignorance, which diminishes culpability) and ignorantia affectata (affected ignorance, which increases it). The rulers in Psalm 82:5 exemplify the latter: their not-knowing is the product of their not-wanting-to-know. The Second Vatican Council (Gaudium et Spes §16) echoes this when it warns that conscience can become "almost blind through the habit of committing sin."
Pope John Paul II, in Veritatis Splendor §32, explicitly teaches that moral truth is not self-created but received — it is a participation in God's own eternal law. The failure of the rulers in Psalm 82 is precisely that they have severed this participatory link: they judge without reference to the divine lawgiver and thus walk in darkness.
The cosmic consequence — the shaking of the foundations — resonates with Catholic Social Teaching's insistence (cf. Rerum Novarum, Compendium of Social Doctrine) that social order is intrinsically dependent on justice and truth. When authority is exercised without these, the entire social edifice becomes unstable.
Psalm 82:5 confronts the contemporary Catholic with a deeply uncomfortable mirror. We live in an age that prides itself on access to information, yet the psalm insists that the deepest human failures are not failures of information but failures of formation — of conscience, of character, of the willingness to see clearly.
For the Catholic who holds any position of authority — a parent, a teacher, a politician, a business leader, a pastor — this verse demands a regular examination of conscience: Am I judging rightly? Am I seeing the poor, the vulnerable, the voiceless — or have I learned not to see them? The darkness the psalm describes is not imposed from outside; it is the slow accumulation of small choices to look away.
Practically, this verse is an argument for the indispensability of moral formation — not merely rule-following, but the cultivation of the virtue of prudence (phronesis), the capacity to see reality as God sees it. The Sacrament of Confession is, among other things, a remedy for the moral blindness this verse diagnoses: it is an act of yada' — of knowing oneself truly in the light of God's mercy and truth. Catholics are invited to pray regularly, as the psalmist implicitly does, for the grace not to become these judges — not to be the ones who walk in darkness while holding the staff of authority.
Commentary
Psalm 82 opens with a dramatic theophany: God presides over a "divine council" and pronounces judgment on the "gods" (elohim) — a term interpreted variously as pagan deities, angelic powers, or more commonly in the Catholic tradition as human judges and rulers who have been entrusted with divine authority. Verses 2–4 enumerate their failures: they show partiality to the wicked, neglect the poor and orphan, and fail to rescue the afflicted. Verse 5 then delivers the psychological and spiritual diagnosis of why they act this way.
"They don't know" — The Hebrew verb yada' (to know) carries a depth far beyond mere cognitive awareness. In the Hebrew Bible, yada' encompasses experiential, relational, and moral knowledge. To "not know" in this sense is not ignorance of facts but a rupture in one's right relationship with God and with the demands of justice that flow from Him. The rulers do not know in the sense that they have become estranged from the very source of wisdom and right judgment. The Psalmist is not excusing them; he is indicting them. Their ignorance is the fruit of their injustice, not its cause.
"Neither do they understand" — The Hebrew root bin (understanding, discernment) refers to the capacity to perceive distinctions — to see things as they truly are. It is the virtue of the just judge: to read situations rightly, to weigh evidence, to recognize the face of God in the poor and the vulnerable. The doubling of the failure — neither knowing nor understanding — is a Hebrew rhetorical device that intensifies the totality of their blindness. It is comprehensive and inexcusable.
"They walk about in darkness" (the fuller verse in many translations) — Verse 5 continues in most manuscripts with the consequence: "they walk about in darkness." This darkness is not environmental but existential. It is the darkness that results from the deliberate turning away from divine light. The verb "walk" (halak) in Hebrew connotes one's entire manner of life, one's habitual conduct. Their whole moral comportment — their way of being in the world — is shrouded in darkness.
"All the foundations of the earth are shaken" — The final clause of verse 5 reveals the cosmic stakes. The unjust exercise of authority does not merely harm individuals; it destabilizes the very order of creation. God established justice as a structural foundation of the cosmos (cf. Ps 89:14: "Righteousness and justice are the foundation of your throne"). When those entrusted with authority corrupt it, they introduce a disorder that reverberates through the created order. This is a profound theological claim: justice is not merely a social good but an ontological necessity, woven into the fabric of what God has made.