The meaning of heart in Quran

The first perceptual feature of heart is that it is a dimension of human that if divine messages are descended from God, it will descend to the heart of human. However, divine messages are not descended to all persons and only prophets are persons that have achieved rank and receive divine messages. Quran states
قُلْ مَن كَانَ عَدُوًّا لِّجِبْرِيلَ فَإِنَّهُ نَزَّلَهُ عَلَىٰ قَلْبِكَ بِإِذْنِ اللَّهِ مُصَدِّقًا لِّمَا بَيْنَ يَدَيْهِ وَهُدًى وَبُشْرَىٰ لِلْمُؤْمِنِينَ
Say: Whoever is an enemy to Gabriel-for he brings down the (revelation) to thy heart by Allah´s will, a confirmation of what went before, and guidance and glad tidings for those who believe.
وَإِنَّهُ لَتَنزِيلُ رَبِّ الْعَالَمِينَ
.Verily this is a Revelation from the Lord of the Worlds
نَزَلَ بِهِ الرُّوحُ الْأَمِينُ
With it came down the spirit of Faith and Truth.
عَلَىٰ قَلْبِكَ لِتَكُونَ مِنَ الْمُنذِرِينَ
To thy heart and mind, that thou mayest admonish.
It should be mentioned that heart is a secure means for receiving divine messages. Quran states
وَمَا نَتَنَزَّلُ إِلَّا بِأَمْرِ رَبِّكَ ۖ لَهُ مَا بَيْنَ أَيْدِينَا وَمَا خَلْفَنَا وَمَا بَيْنَ ذَٰلِكَ ۚ وَمَا كَانَ رَبُّكَ نَسِيًّا
(The angels say:) "We descend not but by command of thy Lord: to Him belongeth what is before us and what is behind us, and what is between: and thy Lord never doth forget.
One of the features of heart is health. Quran states
بَلْ جَاءَ بِالْحَقِّ وَصَدَّقَ الْمُرْسَلِينَ
Nay! he has come with the (very) Truth, and he confirms (the Message of) the messengers (before him).
يَوْمَ لَا يَنفَعُ مَالٌ وَلَا بَنُونَ
. "''The Day whereon neither wealth nor sons will avail
إِلَّا مَنْ أَتَى اللَّهَ بِقَلْبٍ سَلِيمٍ
. "''But only he (will prosper) that brings to Allah a sound heart
إِذْ جَاءَ رَبَّهُ بِقَلْبٍ سَلِيمٍ
. Behold! he approached his Lord with a sound heart
In the following verses, the meaning of mentioning has been attributed to the word ''heart'';
قَالَ ذَٰلِكَ بَيْنِي وَبَيْنَكَ ۖ أَيَّمَا الْأَجَلَيْنِ قَضَيْتُ فَلَا عُدْوَانَ عَلَيَّ ۖ وَاللَّهُ عَلَىٰ مَا نَقُولُ وَكِيلٌ
He said: "Be that (the agreement) between me and thee: whichever of the two terms I fulfil, let there be no ill-will to me. Be Allah a witness to what we say''.
أَفَمَن شَرَحَ اللَّهُ صَدْرَهُ لِلْإِسْلَامِ فَهُوَ عَلَىٰ نُورٍ مِّن رَّبِّهِ ۚ فَوَيْلٌ لِّلْقَاسِيَةِ قُلُوبُهُم مِّن ذِكْرِ اللَّهِ ۚ أُولَٰئِكَ فِي ضَلَالٍ مُّبِينٍ
Is one whose heart Allah has opened to Islam, so that he has received Enlightenment from Allah, (no better than one hard-hearted)? Woe to those whose hearts are hardened against celebrating the praises of Allah! they are manifestly wandering (in error).
One of the features of heart is testability as Quran states
إِنَّ الَّذِينَ يَغُضُّونَ أَصْوَاتَهُمْ عِندَ رَسُولِ اللَّهِ أُولَٰئِكَ الَّذِينَ امْتَحَنَ اللَّهُ قُلُوبَهُمْ لِلتَّقْوَىٰ ۚ لَهُم مَّغْفِرَةٌ وَأَجْرٌ عَظِيمٌ
Those that lower their voices in the presence of Allah´s Messenger,- their hearts has Allah tested for piety: for them is Forgiveness and a great Reward.
In Quran, heart has been mention as a responsible member;
وَلَا تَقْفُ مَا لَيْسَ لَكَ بِهِ عِلْمٌ ۚ إِنَّ السَّمْعَ وَالْبَصَرَ وَالْفُؤَادَ كُلُّ أُولَٰئِكَ كَانَ عَنْهُ مَسْئُولًا
And pursue not that of which thou hast no knowledge; for every act of hearing, or of seeing or of (feeling in) the heart will be enquired into (on the Day of Reckoning.
One of features of heart is to help persons to gain understanding;
وَلَقَدْ مَكَّنَّاهُمْ فِيمَا إِن مَّكَّنَّاكُمْ فِيهِ وَجَعَلْنَا لَهُمْ سَمْعًا وَأَبْصَارًا وَأَفْئِدَةً فَمَا أَغْنَىٰ عَنْهُمْ سَمْعُهُمْ وَلَا أَبْصَارُهُمْ وَلَا أَفْئِدَتُهُم مِّن شَيْءٍ إِذْ كَانُوا يَجْحَدُونَ بِآيَاتِ اللَّهِ وَحَاقَ بِهِم مَّا كَانُوا بِهِ يَسْتَهْزِئُونَ
And We had firmly established them in a (prosperity and) power which We have not given to you (ye Quraish!) and We had endowed them with (faculties of) hearing, seeing, heart and intellect: but of no profit to them were their (faculties of) hearing, sight, and heart and intellect, when they went on rejecting the Signs of Allah; and they were (completely) encircled by that which they used to mock at.
In the following verse, one of features of Quran is ending;
خَتَمَ اللَّهُ عَلَىٰ قُلُوبِهِمْ وَعَلَىٰ سَمْعِهِمْ ۖ وَعَلَىٰ أَبْصَارِهِمْ غِشَاوَةٌ ۖ وَلَهُمْ عَذَابٌ عَظِيمٌ
Allah hath set a seal on their hearts and on their hearing, and on their eyes is a veil; great is the penalty they (incur).
One of the features of heat is neglect. Quran states
وَاصْبِرْ نَفْسَكَ مَعَ الَّذِينَ يَدْعُونَ رَبَّهُم بِالْغَدَاةِ وَالْعَشِيِّ يُرِيدُونَ وَجْهَهُ ۖ وَلَا تَعْدُ عَيْنَاكَ عَنْهُمْ تُرِيدُ زِينَةَ الْحَيَاةِ الدُّنْيَا ۖ وَلَا تُطِعْ مَنْ أَغْفَلْنَا قَلْبَهُ عَن ذِكْرِنَا وَاتَّبَعَ هَوَاهُ وَكَانَ أَمْرُهُ فُرُطًا
And keep thy soul content with those who call on their Lord morning and evening, seeking His Face; and let not thine eyes pass beyond them, seeking the pomp and glitter of this Life; no obey any whose heart We have permitted to neglect the remembrance of Us, one who follows his own desires, whose case has gone beyond all bounds.
وَقَالُوا قُلُوبُنَا غُلْفٌ ۚ بَل لَّعَنَهُمُ اللَّهُ بِكُفْرِهِمْ فَقَلِيلًا مَّا يُؤْمِنُونَ
They say, "Our hearts are the wrappings (which preserve Allah´s Word: we need no more)." Nay, Allah´s curse is on them for their blasphemy: Little is it they believe.
One of the features of heart is its cruelty. Quran states
فَبِمَا نَقْضِهِم مِّيثَاقَهُمْ لَعَنَّاهُمْ وَجَعَلْنَا قُلُوبَهُمْ قَاسِيَةً ۖ يُحَرِّفُونَ الْكَلِمَ عَن مَّوَاضِعِهِ ۙ وَنَسُوا حَظًّا مِّمَّا ذُكِّرُوا بِهِ ۚ وَلَا تَزَالُ تَطَّلِعُ عَلَىٰ خَائِنَةٍ مِّنْهُمْ إِلَّا قَلِيلًا مِّنْهُمْ ۖ فَاعْفُ عَنْهُمْ وَاصْفَحْ ۚ إِنَّ اللَّهَ يُحِبُّ الْمُحْسِنِينَ
But because of their breach of their covenant, We cursed them, and made their hearts grow hard; they change the words from their (right) places and forget a good part of the message that was sent them, nor wilt thou cease to find them- barring a few - ever bent on (new) deceits: but forgive them, and overlook (their misdeeds): for Allah loveth those who are kind.
One of the features of heart is lick. Quran states
هُوَ الَّذِي أَنزَلَ عَلَيْكَ الْكِتَابَ مِنْهُ آيَاتٌ مُّحْكَمَاتٌ هُنَّ أُمُّ الْكِتَابِ وَأُخَرُ مُتَشَابِهَاتٌ ۖ فَأَمَّا الَّذِينَ فِي قُلُوبِهِمْ زَيْغٌ فَيَتَّبِعُونَ مَا تَشَابَهَ مِنْهُ ابْتِغَاءَ الْفِتْنَةِ وَابْتِغَاءَ تَأْوِيلِهِ ۗ وَمَا يَعْلَمُ تَأْوِيلَهُ إِلَّا اللَّهُ ۗ وَالرَّاسِخُونَ فِي الْعِلْمِ يَقُولُونَ آمَنَّا بِهِ كُلٌّ مِّنْ عِندِ رَبِّنَا ۗ وَمَا يَذَّكَّرُ إِلَّا أُولُو الْأَلْبَابِ
He it is Who has sent down to thee the Book: In it are verses basic or fundamental (of established meaning); they are the foundation of the Book: others are allegorical. But those in whose hearts is perversity follow the part thereof that is allegorical, seeking discord, and searching for its hidden meanings, but no one knows its hidden meanings except Allah. And those who are firmly grounded in knowledge say: "We believe in the Book; the whole of it is from our Lord:" and none will grasp the Message except men of understanding''.
One of the features of heart is akene as Quran states
وَمِنْهُم مَّن يَسْتَمِعُ إِلَيْكَ ۖ وَجَعَلْنَا عَلَىٰ قُلُوبِهِمْ أَكِنَّةً أَن يَفْقَهُوهُ وَفِي آذَانِهِمْ وَقْرًا ۚ وَإِن يَرَوْا كُلَّ آيَةٍ لَّا يُؤْمِنُوا بِهَا ۚ حَتَّىٰ إِذَا جَاءُوكَ يُجَادِلُونَكَ يَقُولُ الَّذِينَ كَفَرُوا إِنْ هَٰذَا إِلَّا أَسَاطِيرُ الْأَوَّلِينَ
Of them there are some who (pretend to) listen to thee; but We have thrown veils on their hearts, So they understand it not, and deafness in their ears; if they saw every one of the signs, not they will believe in them; in so much that when they come to thee, they (but) dispute with thee; the Unbelievers say: "These are nothing but tales of the ancients''.
وَجَعَلْنَا عَلَىٰ قُلُوبِهِمْ أَكِنَّةً أَن يَفْقَهُوهُ وَفِي آذَانِهِمْ وَقْرًا ۚ وَإِذَا ذَكَرْتَ رَبَّكَ فِي الْقُرْآنِ وَحْدَهُ وَلَّوْا عَلَىٰ أَدْبَارِهِمْ نُفُورًا
And We put coverings over their hearts (and minds) lest they should understand the Qur´an, and deafness into their ears: when thou dost commemorate thy Lord and Him alone in the Qur´an, they turn on their backs, fleeing (from the Truth).
One of interpretations applied in Quran for hear is its uselessness;
رِجَالٌ لَّا تُلْهِيهِمْ تِجَارَةٌ وَلَا بَيْعٌ عَن ذِكْرِ اللَّهِ وَإِقَامِ الصَّلَاةِ وَإِيتَاءِ الزَّكَاةِ ۙ يَخَافُونَ يَوْمًا تَتَقَلَّبُ فِيهِ الْقُلُوبُ وَالْأَبْصَارُ
By men whom neither traffic nor merchandise can divert from the Remembrance of Allah, nor from regular Prayer, nor from the practice of regular Charity: Their (only) fear is for the Day when hearts and eyes will be transformed (in a world wholly new .
Quran states that heart is the place of the descending of revelation to prophets;
قُلْ مَن كَانَ عَدُوًّا لِّجِبْرِيلَ فَإِنَّهُ نَزَّلَهُ عَلَىٰ قَلْبِكَ بِإِذْنِ اللَّهِ مُصَدِّقًا لِّمَا بَيْنَ يَدَيْهِ وَهُدًى وَبُشْرَىٰ لِلْمُؤْمِنِينَ
Say: Whoever is an enemy to Gabriel-for he brings down the (revelation) to thy heart by Allah´s will, a confirmation of what went before, and guidance and glad tidings for those who believe.
مَا نَتَنَزَّلُ إِلَّا بِأَمْرِ رَبِّكَ ۖ لَهُ مَا بَيْنَ أَيْدِينَا وَمَا خَلْفَنَا وَمَا بَيْنَ ذَٰلِكَ ۚ وَمَا كَانَ رَبُّكَ نَسِيًّا
(The angels say:) "We descend not but by command of thy Lord: to Him belongeth what is before us and what is behind us, and what is between: and thy Lord never doth forget.
In the following verses, wisdom is applied to heart;
أَفَلَمْ يَسِيرُوا فِي الْأَرْضِ فَتَكُونَ لَهُمْ قُلُوبٌ يَعْقِلُونَ بِهَا أَوْ آذَانٌ يَسْمَعُونَ بِهَا ۖ فَإِنَّهَا لَا تَعْمَى الْأَبْصَارُ وَلَٰكِن تَعْمَى الْقُلُوبُ الَّتِي فِي الصُّدُورِ
Do they not travel through the land, so that their hearts (and minds) may thus learn wisdom and their ears may thus learn to hear? Truly it is not their eyes that are blind, but their hearts which are in their breasts.
لَا يُقَاتِلُونَكُمْ جَمِيعًا إِلَّا فِي قُرًى مُّحَصَّنَةٍ أَوْ مِن وَرَاءِ جُدُرٍ ۚ بَأْسُهُم بَيْنَهُمْ شَدِيدٌ ۚ تَحْسَبُهُمْ جَمِيعًا وَقُلُوبُهُمْ شَتَّىٰ ۚ ذَٰلِكَ بِأَنَّهُمْ قَوْمٌ لَّا يَعْقِلُونَ
They will not fight you (even) together, except in fortified townships, or from behind walls. Strong is their fighting (spirit) amongst themselves: thou wouldst think they were united, but their hearts are divided: that is because they are a people devoid of wisdom.
Heart and sense are both for the guidance of human as Quran states
قُلْ أَرَأَيْتُمْ إِنْ أَخَذَ اللَّهُ سَمْعَكُمْ وَأَبْصَارَكُمْ وَخَتَمَ عَلَىٰ قُلُوبِكُم مَّنْ إِلَٰهٌ غَيْرُ اللَّهِ يَأْتِيكُم بِهِ ۗ انظُرْ كَيْفَ نُصَرِّفُ الْآيَاتِ ثُمَّ هُمْ يَصْدِفُونَ
Say: "Think ye, if Allah took away your hearing and your sight, and sealed up your hearts, who - a god other than Allah - could restore them to you?" See how We explain the signs by various (symbols); yet they turn aside''.
Quran states that revelation and divine messages do not devote to certain time and place;
وَلَقَدْ كُذِّبَتْ رُسُلٌ مِّن قَبْلِكَ فَصَبَرُوا عَلَىٰ مَا كُذِّبُوا وَأُوذُوا حَتَّىٰ أَتَاهُمْ نَصْرُنَا ۚ وَلَا مُبَدِّلَ لِكَلِمَاتِ اللَّهِ ۚ وَلَقَدْ جَاءَكَ مِن نَّبَإِ الْمُرْسَلِينَ
Rejected were the messengers before thee: with patience and constancy they bore their rejection and their wrongs, until Our aid did reach them: there is none that can alter the words (and decrees) of Allah. Already hast thou received some account of those messengers?
وَإِذْ أَخَذْنَا مِيثَاقَكُمْ وَرَفَعْنَا فَوْقَكُمُ الطُّورَ خُذُوا مَا آتَيْنَاكُم بِقُوَّةٍ وَاسْمَعُوا ۖ قَالُوا سَمِعْنَا وَعَصَيْنَا وَأُشْرِبُوا فِي قُلُوبِهِمُ الْعِجْلَ بِكُفْرِهِمْ ۚ قُلْ بِئْسَمَا يَأْمُرُكُم بِهِ إِيمَانُكُمْ إِن كُنتُم مُّؤْمِنِينَ
And remember We took your covenant and We raised above you (the towering height) of Mount (Sinai): (Saying): "Hold firmly to what We have given you, and hearken (to the Law)": They said:" We hear, and we disobey:" And they had to drink into their hearts (of the taint) of the calf because of their Faithlessness. Say: "Vile indeed are the behests of your Faith if ye have any faith.
وَإِذْ قَالَ إِبْرَاهِيمُ رَبِّ اجْعَلْ هَٰذَا بَلَدًا آمِنًا وَارْزُقْ أَهْلَهُ مِنَ الثَّمَرَاتِ مَنْ آمَنَ مِنْهُم بِاللَّهِ وَالْيَوْمِ الْآخِرِ ۖ قَالَ وَمَن كَفَرَ فَأُمَتِّعُهُ قَلِيلًا ثُمَّ أَضْطَرُّهُ إِلَىٰ عَذَابِ النَّارِ ۖ وَبِئْسَ الْمَصِيرُ
And remember Abraham said: "My Lord, make this a City of Peace, and feed its people with fruits,-such of them as believe in Allah and the Last Day." He said: "(Yea), and such as reject Faith,-for a while will I grant them their pleasure, but will soon drive them to the torment of Fire,- an evil destination (indeed).