Hearing, Sight and the Heart: The Quran's Instruments of Knowledge

There is a moment, told in several passages of the Quran, when every one of us was given a remarkable gift: ears, eyes and a heart. The Quran returns to this gift again and again, as if to remind us that knowing is not an abstract activity — it happens through the body and the inner life, and it carries a responsibility. This dossier walks through the main passages where hearing (samʿ), sight (baṣar) and the heart (qalb, fuʾād) appear together or alone, and listens to the Arabic words that carry their meaning.

The gift at the beginning of life

The clearest statement of the theme comes in surah An-Nahl: God brought you out of your mothers' wombs knowing nothing, and gave you hearing, eyes and hearts, so that you might be grateful [16:78]. The verb here is jaʿala — He made, He appointed — and the purpose clause "so that you may give thanks" (laʿallakum tashkurūna) ties the senses directly to gratitude. A parallel verse in surah Al-Muʾminūn repeats the triad and adds that little you give thanks [23:78]. Surah As-Sajdah places the gift inside the story of creation: God fashioned the human being, then appointed for him hearing and sight and a heart [32:9]. The word used there, afʾida (singular fuʾād), is a warm, intimate word for the heart — the inner organ of feeling and understanding. Another passage, in surah Al-Insān, describes the human being created from a mingled fluid and then tested with hearing and sight [76:2], suggesting from the very start that these faculties are also a trial.

A full inventory in one verse

Surah Al-Mulk opens its questions of providence with a striking enumeration: it is He who made for you hearing, eyes and hearts; little do you give thanks [67:23]. The Arabic words are precise: samʿ (hearing), abṣār (sights, eyes), afʾida (hearts). Notice the plural forms — the Quran often speaks in the plural, addressing whole communities rather than isolated individuals, as if knowledge were a shared inheritance. A few verses later, the same surah asks who owns the heavens and the earth, and answers: say, to God; He has taken responsibility for mercy upon Himself, and He will gather you on the Day of Resurrection, about which there is no doubt [67:24-29]. The senses given here below will one day answer for what they did.

The heart as the seat of understanding

For the Quran, the heart is not only the seat of emotion; it is where understanding happens. Surah Muhammad asks a question that still stings: do they not reflect deeply upon the Quran, or are there locks upon their hearts? [47:24]. The word for reflecting is yatadabbarūna, from d-b-r, to consider the end and the depth of a thing — a slow, deliberate act. Surah Qaf makes the same claim about all revelation: this is a noble Quran, in a written register, that they may remember; and it is not passed over except by those God covers — but only those with hearts listen to it while bearing witness [50:1-37]. The expression "a heart that listens" (qalb yasmaʿu) fuses two of our three instruments: hearing becomes true only when the heart receives it. And surah An-Najm, speaking of the Prophet's vision at the moment of revelation, insists: the heart did not lie about what it saw [53:11] — the fuʾād is presented as a genuine organ of perception.

When the senses work but understanding fails

The Quran knows people whose ears, eyes and hearts are physically intact yet spiritually sealed. Surah Al-Baqarah says of those who break their covenant: God has set a seal upon their hearts and their hearing, and over their eyes is a covering [2:7]. The word for covering is ghishāwa — a veil, like a cloth thrown over the eyes. Surah Al-Aʿrāf draws the famous portrait of those who have hearts but do not understand, eyes but do not see, ears but do not hear: they are like cattle, even more astray — those are the heedless [7:179]. The word ghāfilūn means those who are absent from what matters. Surah Al-Hajj adds a sobering thought: hearts have become hardened like stones, or even harder, for among stones are those from which rivers burst — while some hearts show no softness [22:46]. That same verse contains one of the most powerful lines on the theme: it is not the eyes that go blind, but the hearts within the chests that go blind. The word ṣamira, to grow blind, is applied to the heart, not the eye.

The verse that forbids following without knowledge

Surah Al-Isrāʾ gives the triad an ethical edge: do not pursue that of which you have no knowledge; hearing, sight and the heart — all of those will be questioned [17:36]. The word masʾūl, "called to account," makes each sense a kind of witness that will one day testify. This verse transforms the senses from passive instruments into trusts (a word the Quran uses elsewhere: hearing, sight and hearts as entrusted faculties [16:81] — God made for you shade, garments of protection, and completed His favor so that you might submit). Knowledge in the Quran is never an excuse for careless speech or speculation; the instruments of knowing are themselves bound to answer.

The deaf and dumb heart of the unbeliever

Surah Al-Baqarah describes those called to faith who hear as though they were a distant cry — deaf, dumb, blind, so they do not return [2:171]. The word for cry, munādī, is a caller shouting to them, yet their instruments fail to receive. Surah Al-Anʿām says God has set a seal on their hearts and hearing, and their eyes are covered; and surah Al-Muṭaffifīn echoes it: on that day they will be veiled from their Lord [83:14-16]. Interestingly, some passages suggest the reverse causality: the covering is not imposed arbitrarily but grows from repeated turning away — surah Al-Mursalāt says woe that day to the deniers, and repeatedly: when they are told to bow, they do not bow [77:34-48]. The senses dull through disuse.

Even the faculties testify

In the hereafter, the very instruments of knowledge given in this world turn into witnesses. Surah Fussilat says: today We seal their mouths, and their hands speak to Us, and their feet bear witness to what they used to earn [41:19-23]. And a passage in surah An-Nūr goes further: their hearing, their eyes and their skins will testify against them about what they used to do [24:24]. The Arabic word shahida, to bear witness, is the same root as shahāda, the declaration of faith — testimony is the Quran's central moral category. The instruments were given for witness; they will not be silenced.

Will they not then travel and look?

Knowledge through the senses is not only inner; it is also empirical. Surah Al-Hajj, right after the verse on blind hearts, invites: have they not traveled through the land and had hearts to understand or ears to hear? [22:46]. The verb yasīrū, to travel, makes observation of the world a religious duty of sorts. Surah Aṣ-Ṣāffāt says of those who deny: travel the earth and see what was the end of the guilty [37:73], and a parallel passage in surah Al-Muʾmin: have they not traveled and seen the fate of those before them? [40:82]. Sight here becomes historical sight — reading ruins as one reads a book.

The Prophet as the model of hearing and heart

Surah An-Najm describes the Prophet at the highest point of revelation: the sight did not swerve, nor did it transgress [53:17]. His eye and his heart worked together in perfect obedience. Surah Al-Aʿrāf commands: say, I am only a human being like you; it is revealed to me that your God is one God, so be upright and seek forgiveness [7:187-188]. The Prophet receives through revelation, the rest of us through the senses — but both paths demand humility of heart. In surah Al-Aʿrāf also: We created you and then shaped you, then said to the angels, prostrate to Adam [7:11]. Honor is given to the whole creature, senses and heart included.

The call that reaches the heart

Surah Al-Anfāl contains the most intimate call in the Quran: O you who believe, respond to God and the Messenger when he calls you to that which gives you life [8:24]. The verb istajībū, to respond, implies that hearing must become answer. And surah Qaf offers the gentle image that closes this study's theme: We know what the earth diminishes of them, and with Us is a preserved register; and how many a sign in the heavens and the earth they pass by while turning away from it — in that is a reminder for whoever has a heart or gives ear while present [50:4-37]. The word ḥaḍir means fully awake, fully present: the whole triad — heart, ear, awareness — is summed up in one state of presence.

Choosing to see

The Quran ends its treatment of the theme on freedom. Surah Al-Balad says: have We not made for him two eyes, a tongue and two lips, and shown him the two ways? [90:8-10]. The instruments are given; the road is shown; the choice remains. Surah Al-Isrāʾ places this in the largest frame: whoever desires this swift world, We hasten for him what We will — then We made Hell for him; but whoever desires the hereafter and strives for it with the effort it deserves, while believing — those, their striving is appreciated [17:18-19]. And the same surah closes its section on the senses with the words: your Lord creates what He wills and chooses; they have never been given the choice [28:68] — a humble reminder that even with eyes and heart, we do not govern the whole. The Quran's invitation stands: use what you were given, and give thanks for it.

What emerges from these passages is a coherent vision: hearing, sight and the heart are not mere biology but a trust, a test and a witness. The Quran praises them when they receive, warns against them when they seal, and promises that they will speak on the last day. To read these verses is to be asked a simple question, tender and serious at once: what are your ears hearing, your eyes seeing, and what is your heart doing with it all?