Catholic Commentary
The Restlessness of the Wicked and the Closing Refrain
20But the wicked are like the troubled sea; for it can’t rest and its waters cast up mire and mud.21“There is no peace”, says my God, “for the wicked.”
Isaiah 57:20–21 compares the wicked to a restless, troubled sea that cannot settle, casting up mire and filth as symbols of moral pollution and spiritual chaos. The passage declares there is no peace for those who have severed covenant relationship with God, excluding them from divine wholeness and flourishing.
The wicked are not punished with restlessness—they are constitutionally incapable of peace because they have severed themselves from the only source that can provide it.
Typological and Spiritual Senses
In the spiritual sense (the sensus spiritualis recognized by Catholic hermeneutics), the troubled sea becomes a figure of the soul in mortal sin — tossed, generating only pollution, incapable of the stillness that Psalm 46:10 identifies with the knowledge of God. The Church Fathers read the "sea" typologically as a figure of the Gentile world in its pre-evangelized chaos, and allegorically as the state of any soul that refuses baptismal grace. St. Augustine's Confessions opens with its famous restlessness — "our heart is restless until it rests in Thee" (inquietum est cor nostrum donec requiescat in te) — a reflection that reads almost as a personal meditation on Isaiah 57:20. The "peace" of v. 21 anticipates the Johannine eirene ("My peace I give to you," John 14:27), the Christological fulfillment of all Isaianic shalom, making clear that what Isaiah announces negatively — the absence of peace from the wicked — Christ announces positively as his own gift to those who receive him.
Catholic tradition illuminates these verses with particular depth on two fronts: the theology of sin as disorder and the nature of divine peace as gift.
First, the image of the troubled sea corresponds precisely to the Catholic understanding of sin not merely as transgression but as ontological disorder. The Catechism of the Catholic Church (CCC §1849–1850) defines sin as "an offense against reason, truth, and right conscience" and a "failure in genuine love for God and neighbor." The wicked sea of v. 20 embodies this: it is not purposefully evil so much as structurally disordered, incapable of the calm that reflects the Creator's rationality. St. Thomas Aquinas, drawing on Augustine, teaches that evil is privation (privatio boni) — the absence of an order that should be present. The mire the sea casts up is precisely this: the refuse of a nature from which the ordering grace of God has been excluded.
Second, Catholic tradition understands shalom in v. 21 as a type of the peace that Christ alone communicates, explicitly identified as such in the Catechism (CCC §2305): "Peace is the work of justice and the effect of charity." This peace is not negotiated but bestowed — it is, as the Second Vatican Council's Gaudium et Spes (§78) affirms, "the fruit of that right ordering of things with which the divine founder has invested human society." The closing refrain "says my God" carries in Catholic exegesis a prophetic authority that reaches its fullness in Christ, the Prince of Peace (Is 9:6), whose Incarnation is itself the divine act that breaks the cycle of restless chaos. Pope Benedict XVI, in Deus Caritas Est, speaks of the restlessness of the human heart seeking love as finding its answer only in the self-giving God — a theological arc that begins precisely in passages like this one.
These two verses name something that Catholic people encounter constantly in contemporary life — the relentless noise, anxiety, and moral drift of a culture that has systematically expelled God from its public and private ordering. The "troubled sea" is not an archaic image; it is the scroll-feed at midnight, the inability to sit in silence, the compulsive consumption that always produces more mire. Isaiah's diagnosis is not moralistic scolding but a structural insight: when the soul refuses its orientation toward God, restlessness is not a side effect — it is the condition itself.
For the contemporary Catholic, these verses issue a concrete invitation to examine what produces interior turbulence. The Sacrament of Reconciliation is, in this light, precisely the divine act of speaking peace into the churning sea of the soul. Regular confession is not a ritual obligation but the specific remedy Isaiah 57 implies is missing from the wicked: the authoritative word of God saying shalom into chaos. Catholics can also hear in v. 21 a call to resist the cultural assumption that peace can be self-constructed through wellness, productivity, or distraction. The refrain is absolute — there is no peace apart from God — and it challenges every substitute that contemporary life offers in its place.
Commentary
Isaiah 57:20 — "But the wicked are like the troubled sea"
The Hebrew adjective for "wicked" (רְשָׁעִים, resha'im) designates not merely the morally corrupt but those who have structurally turned away from covenant relationship with YHWH. Their inner state is compared — with precise literary force — to the sea (הַיָּם), specifically a troubled or tossed sea (נִגְרָשׁ, nigrash, from a root meaning "to be driven away" or "expelled"). This is not merely stormy water; it is restless water that cannot rest. The verse completes the image graphically: it "casts up mire and dirt," a detail absent in some modern translations but present in the full Masoretic text. The sea does not choose this restlessness — it is the very nature of the disordered element. So too, the wicked are not incidentally troubled; their expulsion from divine peace is constitutive of the state they have chosen.
This image carries deep cosmological resonance in the Hebrew imagination. In Ancient Near Eastern thought, the sea (yam) was the emblem of primordial chaos, the unformed and threatening depth over which God moved in Genesis 1:2. Isaiah here reactivates that mythology theologically: the wicked inhabit an unredeemed, pre-creation chaos within their own souls. They are, existentially, before the ordering Word of God has spoken peace into them. The mire (tit, טִיט) and dirt (refesh, רֶפֶשׁ) that the sea casts up are images of moral pollution, waste product of an interior life unmoored from God. The Septuagint renders this vividly, and the image was not lost on patristic readers who saw in this verse a portrait of the soul constitutionally unable to settle because it refuses the order that only God can supply.
Isaiah 57:21 — "There is no peace, says my God"
This is the second occurrence of this refrain in Isaiah (see 48:22, where it appears almost identically, closing a different section of Deutero-Isaiah). The repetition is deliberate and structurally significant: it functions as a colophon, a closing seal. The phrase "says my God" (אָמַר אֱלֹהַי, amar Elohai) is intensely personal — the prophet does not say "says the LORD" in the usual prophetic formula, but "says my God," testifying to his own covenantal intimacy with YHWH even as he pronounces judgment on those who have broken that covenant. The word "peace" (שָׁלוֹם, shalom) in its full Hebrew sense is not mere absence of conflict but comprehensive well-being, wholeness, right relationship — it encompasses physical security, social justice, interior harmony, and above all, restored communion with God. To say there is no for the wicked is to say they are excluded from the entirety of the divine gift of flourishing.