Darkness in the Deep: The Sea's Image in Surah An-Nur

Some images stay with you long after you close the book. In Surah An-Nur, the chapter of the Quran whose very name means "The Light," one verse paints a picture of a person adrift on an open sea: waves upon waves, clouds piled above, layers of darkness so deep that a hand stretched out cannot be seen. It is one of the most vivid passages in the whole Quran, and this dossier walks slowly through it and through the wider sea-language of the Quran that surrounds it.

The chapter that carries light

Surah An-Nur takes its name from the famous Light Verse [24:35], where God is called the Light of the heavens and the earth, pictured through a lamp in a niche, a shining olive tree. Immediately after, the chapter turns to the opposite: a picture of darkness. [24:39] first describes the deeds of those who disbelieve as a mirage — a shimmer that thirsty travelers mistake for water until they reach it and find nothing. The image of water that deceives then deepens, in [24:40], into water that swallows. Light and darkness are set side by side, as they are at the very opening of the Quran's story of creation, where [6:1] praises the One who created the heavens and the earth and brought forth darkness and light (al-ẓulumāt wa-n-nūr).

The verse of the deep sea

The heart of our theme is [24:40]. It describes deeds like darknesses over a deep sea (lujj), covered by wave upon wave (mawj), above which are clouds — darknesses piled one upon another, so that when a hand is stretched out, it can barely be seen. The key word lujj means the deep interior of the sea, far from shore; mawj is a wave, and the verse layers them: a wave, above it another wave, above that clouds. The plural ẓulumāt — "darknesses" — is characteristic of Quranic style: not one darkness but many, stacked like the water itself. The verse closes with a striking sentence: the one for whom God has not appointed light has no light at all. Darkness in the image is not only physical; it is the condition of a heart without guidance.

Ẓulumāt: why the darknesses are plural

Throughout the Quran, darkness appears almost always in the plural: ẓulumāt. [13:16] asks who created the darknesses and the light, and [14:1] and [14:5] speak of bringing people out of the darknesses into the light — out of the plural into the singular. Scholars of language have long noted the elegance of this: every person's blindness is different, but guidance is one. The layered darkness of [24:40] gives the plural a physical form: depth of water, wave above it, cloud above that, each adding its shadow. Even a verse about small creeping creatures, [24:45], uses the same vocabulary of water, movement, and creation, showing how the chapter keeps drawing us back to this imagery.

The danger of the open sea

The Quran returns again and again to a recognizable human experience: being at sea when the weather turns. [10:22] describes travelers on a ship sailing with a fair wind, rejoicing, until a stormy wind comes and waves come upon them from every side, and they feel they are surrounded — and there they call upon God with sincere devotion. [17:66-67] makes the same turn: God sends the ships upon the sea, and when harm touches you on the waves, every calling disappears except to Him. [31:31-32] repeats the picture: when the waves cover them like canopies (a word related to ẓulal, shadows), they call upon God with sincere religion. The sea, calm and terrifying in turn, becomes a mirror of the human heart — self-forgetting in ease, remembering in the dark.

Waves without rest

Surah Al-Rahman offers a different sea image: two seas that meet yet do not transgress, with a barrier between them [55:19-20], a theme echoed in [25:53] and [27:61]. Commentators have debated what these "two seas" are — fresh and salt waters, or something beyond human sight — and the Quran itself does not settle the question; what is clear is the sense of an ordered creation with hidden boundaries. The same chapter moves from stillness to motion when it mentions ships that ride the sea like mountains [55:24], a reminder that even the heaviest vessel is small against the deep. And in [42:32-33], His are the moving ships like mountains on the sea, and if He willed, He would still the wind — and they would remain motionless on its surface. The wave in [24:40] is thus not chaos; it is motion held within limits.

Signs on land and at sea

[2:164] lists the creation of the heavens and the earth, the difference of night and day, and the ships that run upon the sea with what benefits people, along with the water God sends down — all as signs for people of understanding. [45:12-13] extends the list: God subjected the sea so that ships may sail on it by His command and that you may seek of His bounty, and all that is in the heavens and the earth has been made subservient. [16:14] adds that it is He who subjected the sea to eat from it tender flesh and to draw out ornaments to wear, and you see the ships plowing through it. In all of these, the sea is a gift and a sign at once — generous and formidable, exactly the mixture that makes the darkness of [24:40] so convincing.

Ships, wind, and trust

Surah Hud records Noah's words as he loads the ark: "Embark in it, in the name of God be its sailing and its anchoring" [11:41] — the verb tajrī, to run or sail, appearing again in the ship verses. [14:32-33] places the ships among God's gifts: the ships that sail (tajrī) in the sea by His command, and the sun and moon and night and day made subservient. The Quran does not pretend the sea is safe; it presents sailing as an act of trust in a power that holds the wind. When the trust is forgotten, the storm verses of [10:22] and [17:67] describe what returns the sailor to memory — a lesson the image of [24:40] folds into its darknesses.

The hand that cannot be seen

Among the most precise touches of [24:40] is the phrase about a hand stretched out: one can hardly see it. The word behind it, qubḍa or qabḍa, refers to the reach of an outstretched hand. Commentators ancient and modern have noticed that sailors and divers know this darkness is real: at certain depths, sunlight simply gives out. What the verse adds is the inner meaning — a person in such darkness cannot even find their own hand, so how could they find the way? It is a picture of helplessness that needs no exaggeration, and it explains why the verse ends where it does: without a light given from outside, there is no light at all.

Darkness as a state of the heart

The Quran uses physical darkness to describe inner states. [2:17-18] compares those who abandon guidance to someone who kindled a fire, and when it lit all around him, God took away their light and left them in darknesses, hearing and seeing nothing — they are deaf, mute, blind. [35:19-22] sets the blind and the seeing side by side, adding that not equal are the darknesses and the light, shadow and heat. In [57:9] and [65:11] God is the one who sends down clear signs upon His servant to bring people out of the darknesses into the light, and in [5:16] a path leads by God's will from the darknesses to the light, to a straight way. The deep sea of An-Nur thus stands at the center of a whole Quranic vocabulary: ẓulumāt (darknesses), ʿamā (the deep blindness of night or soul), and nūr (light).

The mercy that answers from the depths

The Quran does not leave anyone in the deep. In [6:59-63] the keys of the unseen belong to God, who knows what is on land and in the sea — and when harm touches you on the sea, those you call upon besides Him vanish, yet when He brings you safely to land you turn away; the passage asks whether He who rescues you from the darknesses of land and sea will not be remembered. [6:63] names that darkness directly: ẓulumāti l-barri wa-l-baḥr, the darknesses of land and sea. And [33:43] closes the circle the way the Light Verse opened it: it is He who sends blessings upon you, and His angels, to bring you out of the darknesses into the light, and He is merciful to the believers.

Reading the image whole

Gathered together, these passages show how carefully An-Nur builds its picture. The mirage of [24:39] gives water that disappoints; the deep sea of [24:40] gives water that hides; the storm verses of [10:22], [17:66-67] and [31:31-32] give water that threatens; the sign verses of [2:164], [16:14] and [45:12-13] give water that serves. Around them all runs the same pair of words — darknesses in the plural, light in the singular — until the final line of [24:40] lands like a stone in still water: whoever has no light given to them has no light. The sea's darkness is not a curse in the Quran; it is a description, drawn from the real world, of what it feels like to move without guidance, and an invitation to look up through the layers toward the One who, in the words of the chapter before it, brings people out of darknesses into the light.