Catholic Commentary
The Undying Worm: Eternal Consequence for the Unrepentant
24“They will go out, and look at the dead bodies of the men who have transgressed against me; for their worm will not die, nor will their fire be quenched, and they will be loathsome to all mankind.”
Isaiah 66:24 describes the final vision of Isaiah, where the redeemed worshippers look upon the corpses of those who rebelled against God in a place of perpetual decay and degradation, their bodies consumed by worms and fire that never cease. This verse establishes a stark contrast between the eternal worship of the faithful and the permanent, visible consequences of covenant rejection, functioning as an eschatological warning inscribed in reality itself.
The book of Isaiah ends not with triumph but with a stark warning: those who reject God's covenant stare into a permanent, shameful ruin — not as punishment inflicted, but as exile freely chosen.
Typological and Spiritual Senses
Typologically, the Valley of Hinnom/Gehenna prefigures the New Testament's developed theology of hell. The physical geography of Jerusalem — city of God above, refuse-valley below — becomes a spatial icon of the spiritual order: the saved gathered for eternal worship, the unrepentant in permanent, self-chosen exile. The liturgical framing is crucial: the eternal Sabbath worship of 66:23 and the vision of 66:24 are not separable. The beatitude of the saved and the ruin of the rebels are two faces of the same eschatological reality. In the allegorical sense, the "worm" and "fire" represent the interior dimension of damnation: the worm as the gnawing of conscience that cannot be silenced, and the fire as the unquenched desire that can never be satisfied — classic patristic interpretations. The "dead bodies" (peger) allegorically signify souls that chose spiritual death over the life offered in God's covenant.
Catholic Dogmatic Teaching
The Catholic Church teaches that hell is a real, eternal state for those who die in unrepented mortal sin, having definitively chosen against God. The Catechism of the Catholic Church states plainly: "The teaching of the Church affirms the existence of hell and its eternity. Immediately after death the souls of those who die in a state of mortal sin descend into hell, where they suffer the punishments of hell, 'eternal fire'" (CCC 1035). Isaiah 66:24 is among the foundational Old Testament texts underlying this dogmatic tradition.
Church Fathers
Origen controversially proposed apokatastasis — the eventual restoration of all souls, even the damned — partly to soften texts like this one. But his position was condemned by the Second Council of Constantinople (553 AD), and the mainstream Patristic tradition held firm. Tertullian (De Spectaculis, 30) and Jerome (Commentary on Isaiah) both read the undying worm as the perpetual torment of conscience. St. Gregory the Great (Moralia in Job IX.66) interpreted the two images as the interior and exterior dimensions of hell's punishment: fire as the pain of sense (poena sensus), the worm as the pain of loss and self-condemnation (poena damni). St. Augustine (City of God XXI.9) engaged this verse directly, arguing against those who took the fire as merely metaphorical, while also affirming its spiritual depth.
The Catechism and the Nature of Hell
Crucially, Catholic teaching — drawing on this passage and on the whole tradition — insists that hell is not primarily a punishment God inflicts but a condition that follows from the creature's definitive rejection of God. CCC 1033: "To die in mortal sin without repenting and accepting God's merciful love means remaining separated from him forever by our own free choice." The "loathsomeness" of the rebels in Isaiah 66:24 captures this: they are not simply absent from the liturgy — they are defined by their rebellion, permanently shaped by it. Hell is, in this sense, the self-portrait of a will that said "non serviam" to the end.
Isaiah 66:24 confronts the contemporary Catholic with a truth that polite religious culture often suppresses: the decisions of this life carry ultimate weight. In an age when "hell" is dismissed as medieval scare-mongering or quietly assumed to be empty, this verse — placed by the Holy Spirit as the final word of Isaiah — refuses to let us look away. The practical application is not fear-mongering but a recovery of moral seriousness. Every Eucharist celebrated is an anticipation of the eternal liturgy of 66:23; every mortal sin committed is a step toward the exile of 66:24. The passage also invites an examination of what we are doing with persistent, habitual sin — the "worm that does not die" may well be an image of what an unaddressed pattern of rebellion does to a soul in this life. The sacrament of Reconciliation is, in this light, not a routine religious obligation but a genuine rescue from a trajectory with an eternal terminus. Catholics should take this verse to Confession — not as a source of scrupulous terror, but as a clarifying mirror that makes the mercy of God in the absolution all the more luminous.
Commentary
Isaiah 66:24 — Literal and Narrative Meaning
Isaiah 66:24 is the book's final word, and its placement is deliberately arresting. The immediately preceding verses (66:18–23) describe an eschatological ingathering of all nations to worship before the Lord; the new heavens and new earth are announced; a permanent priesthood is established. It is a scene of unparalleled cosmic liturgy. Then, with an abrupt pivot, the vision turns outward — beyond the gates of Jerusalem, toward the Valley of Hinnom (Gehenna), or at least toward a place associated with it — where a different, terrible reality is on display.
"They will go out": The subject is the worshippers just described — those who have come before the LORD in the new Jerusalem. Their "going out" echoes the movement of pilgrims leaving the Temple precincts and looking beyond. It is a contemplative act, not a vengeful one. They look (Hebrew: וְרָאוּ, wĕrā'û); they behold as witnesses, not executioners.
"The dead bodies of the men who have transgressed against me": The Hebrew peger (פֶּגֶר) denotes a corpse, specifically one that is exposed and unburied — the ultimate disgrace in ancient Near Eastern culture. These are not random sinners; the text specifies pōšĕ'îm bî — "those who have rebelled against me," using the covenant-rebellion language (pāša') that runs throughout Isaiah (1:2, 43:27, 48:8). This is not mere moral failing but deliberate, persistent rejection of the LORD's covenant lordship.
"Their worm will not die, nor will their fire be quenched": These two images are the theological crux of the verse. In historical context, the Valley of Hinnom (Ge-Hinnom) outside Jerusalem was a site where refuse and, at times, unburied corpses were burned; worms and fire were the natural agents of decomposition. But the negations — "will not die," "will not be quenched" — shatter any merely naturalistic reading. These are not temporary processes of decay but permanent states. The fire is not consuming the body to nothing; the worm does not finish its work. The text describes a condition of ongoing, unresolved consequence. The grammar uses the imperfect tense, conveying unending, habitual action.
"They will be loathsome (דֵּרָאוֹן, dêrā'ôn) to all mankind": The Hebrew dêrā'ôn appears only twice in the entire Hebrew Bible — here and in Daniel 12:2, where it describes the fate of those who rise to "everlasting contempt." This rare word denotes a deep, visceral revulsion; not mere distaste but abhorrence. The rebels are not simply absent from the liturgy — they are a perpetual sign, a monument to the consequences of covenant infidelity. Paradoxically, their visibility serves the living: they are a warning inscribed in reality itself.