The Wavering Heart in the Quran: Reading Verse 39:22 and Its Echoes

The Quran speaks constantly to the human heart — qalb in Arabic, the word at the root of this whole study. Sometimes the heart is alive, open and steady; sometimes it trembles, wavers, or hardens like stone. Surah az-Zumar, verse 22, places these two states side by side and asks a striking question: are they equal? This dossier follows that question through the Quran, listening to the key Arabic words the Book uses to describe the wavering heart and the ways it can be healed, steadied, and returned.

An open heart or a darkened one

[39:22] opens with the verb insharaha — to expand, to open wide — applied to the chest (sadr) and the breast (qalb) for Islam, so that the person walks in a light from their Lord. Against this stands the other image: whoever has a heart sealed against the remembrance of God, wandering in misguidance. The verb used is inqalada, a form suggesting a door pulled firmly shut. The verse then asks whether the two can be the same, and warns that whoever's heart is qasiyy — hard, stiff, resistant — is in manifest loss. The wavering heart, then, is not the worst state the Quran describes; but hardness of heart is the state where wavering can no longer even be felt.

The trembling of a heart that hesitates

Two words describe hesitation with unusual precision. One is tadhrib from the root dh-r-b: in [3:151] God says He will cast terror — ru'b — into the hearts of those who disbelieve, because they associate with God what He never sent down as authority. The word for a heart that shakes between positions appears again in [59:14], where the enemies of the believers are described as united in appearance but with hearts that are sha'ida — torn, divided, quivering inwardly, because they are a people who do not understand. Wavering here is not a passing mood; it is the visible sign of an inner division.

Doubt that settles in

Another Quranic word for the wavering heart is born from the verb shabaha, to confuse, to mix up. From it comes ishtibah, doubt or perplexity — the state of a heart that sees signs and says nothing clear about them. [9:125] describes people whose hearts, exposed to the revelations, become sick and go on adding sickness to their sickness, so that they die while they are disbelievers. Earlier, [9:117] uses a striking form of the same root family: of the three who were left behind, their hearts tazhabu — wavered, leaned, inclined this way and that — until the earth, vast as it was, felt narrow to them. The Quran then narrates how they repented and how God turned to them [9:118]. The wavering heart, when it turns back, finds a door open.

Fear, and the heart that races

Fear is a natural movement of the heart, and the Quran does not condemn fear itself — it distinguishes fears. [8:49] mentions the hypocrites telling those who believe, "the believers have deceived you," while a fitna — a trial or shaking — is in their own hearts. In [22:53] the same root appears: God lets a test pass through so that those in whose hearts is a disease and whose hearts are hard may come to light. And in [3:154], after a battle, a group is described whose hearts trembled with every kind of dark thought, unjustly suspecting God. The wavering heart here is a heart during crisis — and the verse continues by mentioning mercy and forgiveness toward it.

The parable of the stone

[2:74] contains one of the most sobering passages on the heart: after all this, are your hearts hardened? The verb is qasiyat, the same stiffness of [39:22]. Then comes the parable — hearts harder than stone, for even stones gush water, split open so rivers emerge, and fall down out of awe of God. The passage does not mock the wavering heart; it warns against the heart that no longer moves at all. In [5:13] the same verb qasat is used of a covenant betrayed, and [4:155] notes that their hearts were hardened even after the covenant. Wavering, painful as it is, proves the heart is still alive and able to receive the waters.

The disease of the heart

The Quran gives the wavering heart a diagnosis in its own vocabulary: marad, sickness. [2:10] speaks of those in whose hearts is a disease who add doubt to their doubt. [33:32] addresses the Prophet's wives with the phrase "one whose heart is sick," asking for words that are pure. [8:49] and [22:53], already mentioned, both use the expression. A sick heart is not a dead heart; it is a heart that can be treated. And the Quran names the treatment: [10:57-58] announces a healing for what is in the breasts — shifa' — together with guidance and mercy, and invites the hearer to rejoice in it more than in any gathering of wealth. For the wavering heart, that invitation is the turning point of the whole dossier.

Darkness, blindness, and the unhearing heart

Some passages describe hearts that no longer perceive. [22:46] asks a piercing question: do they not travel through the earth so that they may have hearts with which to understand, or ears with which to hear? For it is not the eyes that go blind, but the hearts within the breasts. [7:179] describes people who have hearts but do not understand by them, eyes but do not see by them — like cattle, even more astray. And [47:24] asks: do they not ponder the Quran, or are there locks upon their hearts? The wavering heart is one stage on a scale; the Quran invites the reader to notice where they stand before the locks close.

What steadies a heart: remembrance and certainty

Against the wavering, the Quran sets two great anchors. The first is remembrance: [13:28] declares that it is in the remembrance of God that hearts find rest — the verb tatma'innu, to become still, to settle after agitation. The second is firmness: [14:27] says God makes those who believe firm — yuthabbitu — with the steadfast word in the life of this world and the hereafter. In [18:14] God Himself says of the young men in the cave, "We strengthened their hearts" — thabbatna — when they stood up. And [8:2] gives the mark of true believers: when God is mentioned, their hearts tremble — wajilat — a trembling of awe, not of panic, that deepens faith rather than scattering it.

The believing heart under pressure

The Quran is realistic about pressure. [16:106] acknowledges the one forced to disbelieve while his heart remains at rest in faith — mutma'inna — the rare exception in which the outward and the inward diverge under compulsion. In [28:10] the mother of Moses is described with a heart become empty — farighan — on the point of betraying her secret, had God not strengthened her heart. Even the strongest hearts waver at the edge of their limits; the dossier's theme is not weakness despised, but weakness known, named, and met with divine support. [3:154-155] similarly shows hearts shaken after loss, and the guidance that follows them.

Hearts that weigh: the discerning reader

The Quran honors a particular quality of heart: the one that weighs. [25:73] praises the servants of the Merciful who, when reminded of the signs, do not fall upon them deaf and blind — the verb tatayyaza, to knock down blindly, is negated of them. [50:37] teaches that in this there is a reminder for whoever has a heart, or listens while present — shahid, attentive, truly there. [26:88-89] ends the search with the only heart that will finally profit on the Day of Judgment: a sound heart, salim. The wavering heart can grow toward this wholeness; it is not asked to be perfect from the start.

The heart that returns

The last word of the dossier belongs to return. [39:23] follows the opening verse directly: God sends down the most beautiful word, and the skins of those who fear their Lord shiver at it, then their skins and their hearts soften — talina — toward the remembrance of God. This softening is the exact opposite of the sealed and hardened heart of [39:22]; it is the wavering heart answering, moved, becoming tender again. Between hardness that closes and softness that receives, the Quran places the reader with a choice renewed at every reading — and with the promise that the heart that turns, even while trembling, is heard.

This dossier has followed one word — qalb — through hardening and sickness, doubt and fear, rest and softening. The wavering heart in the Quran is never condemned for trembling; what matters is the direction of its turning, and the healing [10:57-58] holds out to everyone still listening. May every reading find the heart a little softer, and a little steadier, than before.