The word ''sincerity'' in Quran

Reality of sincerity is to hate other creators except God. Ragheb says about sincerity '' remarks should be based on actions. Persons should believe that other creatures are not accompanied with unity of God''. Quran states
قُلْ هُوَ اللَّهُ أَحَدٌ
.Say: He is Allah, the One and Only
اللَّهُ الصَّمَدُ
.Allah, the Eternal, Absolute
لَمْ يَلِدْ وَلَمْ يُولَدْ
He begetteth not, nor is He begotten.
وَلَمْ يَكُن لَّهُ كُفُوًا أَحَدٌ
And there is none like unto Him.
In fact, sincerity depends on action. In other words, only purpose of persons is for God and his satisfaction in their deeds. Such persons do not want the world and deceptive affairs related to it such as attraction of respect and friendship of people.
Gheshiri says '' sincerity is to obey only immaculate God. If such sincere persons worship God, they will want to approach him''. Quran states
وَاتْلُ عَلَيْهِمْ نَبَأَ ابْنَيْ آدَمَ بِالْحَقِّ إِذْ قَرَّبَا قُرْبَانًا فَتُقُبِّلَ مِنْ أَحَدِهِمَا وَلَمْ يُتَقَبَّلْ مِنَ الْآخَرِ قَالَ لَأَقْتُلَنَّكَ ۖ قَالَ إِنَّمَا يَتَقَبَّلُ اللَّهُ مِنَ الْمُتَّقِينَ
Recite to them the truth of the story of the two sons of Adam. Behold! they each presented a sacrifice (to Allah): It was accepted from one, but not from the other. Said the latter: "Be sure I will slay thee." "Surely," said the former, "Allah doth accept of the sacrifice of those who are righteous''.
Mola Sadra says '' persons that worship God do good actions because of enjoyment of the heaven and fear of the hell. Most of persons that have spent their life in lusts and love of the world tend lusts are dependent in material interests because they have been convinced of temporary pleasures and do not pay attention to pains and sufferings. Persons that focus on their relationship with God do not commit sins because they fear from the hell. Such persons do good actions because they fear from the hell and want the heaven and its pleasures. Quran states
قُلْ هَلْ نُنَبِّئُكُم بِالْأَخْسَرِينَ أَعْمَالًا
"Shall we tell you of those who lose most in respect of their deeds''?
الَّذِينَ ضَلَّ سَعْيُهُمْ فِي الْحَيَاةِ الدُّنْيَا وَهُمْ يَحْسَبُونَ أَنَّهُمْ يُحْسِنُونَ صُنْعًا
Those whose efforts have been wasted in this life, while they thought that they were acquiring good by their works.
Hazife Marashi says '' sincerity is that actions of persons are accompanied with good intentions''. Most of scholars and religious persons believe that actions should be pure and sincere so that achieving God can be easier. If there is no sincerity, persons will be deviated and will go wrong as Quran states
وَمَا أُمِرُوا إِلَّا لِيَعْبُدُوا اللَّهَ مُخْلِصِينَ لَهُ الدِّينَ حُنَفَاءَ وَيُقِيمُوا الصَّلَاةَ وَيُؤْتُوا الزَّكَاةَ ۚ وَذَٰلِكَ دِينُ الْقَيِّمَةِ
And they have been commanded no more than this: To worship Allah, offering Him sincere devotion, being true (in faith); to establish regular prayer; and to practise regular charity; and that is the Religion Right and Straight.
إِلَّا عِبَادَ اللَّهِ الْمُخْلَصِينَ
But the sincere (and devoted) Servants of Allah.
Allame Tabatabaei says about the above verse ''God has purified sincere persons and such sincere persons know that only God is in their heart ''.
Ghazali believes '' sincerity is opposite of polytheism and if a person is not sincere, he or she will be polytheistic''. Sincerity is same monotheism and insincerity is same polytheism. He also says '' if a person lives for God sincerely, he or she will be free''.
There is no question that basis of sincerity is intention. When a person specifies his or her purpose and prepares its means, he or she will behave and act according to it. According to Ghazali, '' each action completes with three things: science, will and power''. Modification of actions depend on modification of intentions and corruption of actions depend on corruption of intentions. It is said in Hadith
''إنَّمَا الاَعمالُ بِالنِّیّاتِ وَ إنَّما لِکُلِّ أمرِئ ما نَوى فَمَن كانَت هِجرَتُهُ إلى اللّهِ وَ رَسُولِهِ فَهجرَتُهُ إلَى اللهِ وَ رَسُولِهِ وَ مَن كانَت هِجرَتُهُ إلى دُنیا یَصیبُها أو امرَأهٌ یَتَزَوَّج بِها فَهِجرَتَهُ إلی ما ‌هاجَرَ إلَیهِ''

Abu Taleb Maki says'' God does not accept remarks without action and remarks and actions without intention''. Intention has two meaning: health of heart along with action done cautiously; 2. Sincerity for God in order to achieve reward of God. Quran states
وَإِنَّ لَكُمْ فِي الْأَنْعَامِ لَعِبْرَةً ۖ نُّسْقِيكُم مِّمَّا فِي بُطُونِهِ مِن بَيْنِ فَرْثٍ وَدَمٍ لَّبَنًا خَالِصًا سَائِغًا لِّلشَّارِبِينَ
And verily in cattle (too) will ye find an instructive sign. From what is within their bodies between excretions and blood, We produce, for your drink, milk, pure and agreeable to those who drink it.
Moreover, it should be reminded that intention is same sincerity in some persons and it is honesty for others. Quran
يَا أَيُّهَا الَّذِينَ آمَنُوا اذْكُرُوا اللَّهَ ذِكْرًا كَثِيرًا
O ye who believe! Celebrate the praises of Allah, and do this often.
إِنَّ الْمُنَافِقِينَ يُخَادِعُونَ اللَّهَ وَهُوَ خَادِعُهُمْ وَإِذَا قَامُوا إِلَى الصَّلَاةِ قَامُوا كُسَالَىٰ يُرَاءُونَ النَّاسَ وَلَا يَذْكُرُونَ اللَّهَ إِلَّا قَلِيلًا
The Hypocrites - they think they are over-reaching Allah, but He will over-reach them: When they stand up to prayer, they stand without earnestness, to be seen of men, but little do they hold Allah in remembrance.
يُوصِيكُمُ اللَّهُ فِي أَوْلَادِكُمْ ۖ لِلذَّكَرِ مِثْلُ حَظِّ الْأُنثَيَيْنِ ۚ فَإِن كُنَّ نِسَاءً فَوْقَ اثْنَتَيْنِ فَلَهُنَّ ثُلُثَا مَا تَرَكَ ۖ وَإِن كَانَتْ وَاحِدَةً فَلَهَا النِّصْفُ ۚ وَلِأَبَوَيْهِ لِكُلِّ وَاحِدٍ مِّنْهُمَا السُّدُسُ مِمَّا تَرَكَ إِن كَانَ لَهُ وَلَدٌ ۚ فَإِن لَّمْ يَكُن لَّهُ وَلَدٌ وَوَرِثَهُ أَبَوَاهُ فَلِأُمِّهِ الثُّلُثُ ۚ فَإِن كَانَ لَهُ إِخْوَةٌ فَلِأُمِّهِ السُّدُسُ ۚ مِن بَعْدِ وَصِيَّةٍ يُوصِي بِهَا أَوْ دَيْنٍ ۗ آبَاؤُكُمْ وَأَبْنَاؤُكُمْ لَا تَدْرُونَ أَيُّهُمْ أَقْرَبُ لَكُمْ نَفْعًا ۚ فَرِيضَةً مِّنَ اللَّهِ ۗ إِنَّ اللَّهَ كَانَ عَلِيمًا حَكِيمًا
Allah (thus) directs you as regards your Children´s (Inheritance): to the male, a portion equal to that of two females: if only daughters, two or more, their share is two-thirds of the inheritance; if only one, her share is a half. For parents, a sixth share of the inheritance to each, if the deceased left children; if no children, and the parents are the (only) heirs, the mother has a third; if the deceased Left brothers (or sisters) the mother has a sixth. (The distribution in all cases (´s) after the payment of legacies and debts. Ye know not whether your parents or your children are nearest to you in benefit. These are settled portions ordained by Allah; and Allah is All-knowing, Al-wise.
وَلَكُمْ نِصْفُ مَا تَرَكَ أَزْوَاجُكُمْ إِن لَّمْ يَكُن لَّهُنَّ وَلَدٌ ۚ فَإِن كَانَ لَهُنَّ وَلَدٌ فَلَكُمُ الرُّبُعُ مِمَّا تَرَكْنَ ۚ مِن بَعْدِ وَصِيَّةٍ يُوصِينَ بِهَا أَوْ دَيْنٍ ۚ وَلَهُنَّ الرُّبُعُ مِمَّا تَرَكْتُمْ إِن لَّمْ يَكُن لَّكُمْ وَلَدٌ ۚ فَإِن كَانَ لَكُمْ وَلَدٌ فَلَهُنَّ الثُّمُنُ مِمَّا تَرَكْتُم ۚ مِّن بَعْدِ وَصِيَّةٍ تُوصُونَ بِهَا أَوْ دَيْنٍ ۗ وَإِن كَانَ رَجُلٌ يُورَثُ كَلَالَةً أَوِ امْرَأَةٌ وَلَهُ أَخٌ أَوْ أُخْتٌ فَلِكُلِّ وَاحِدٍ مِّنْهُمَا السُّدُسُ ۚ فَإِن كَانُوا أَكْثَرَ مِن ذَٰلِكَ فَهُمْ شُرَكَاءُ فِي الثُّلُثِ ۚ مِن بَعْدِ وَصِيَّةٍ يُوصَىٰ بِهَا أَوْ دَيْنٍ غَيْرَ مُضَارٍّ ۚ وَصِيَّةً مِّنَ اللَّهِ ۗ وَاللَّهُ عَلِيمٌ حَلِيمٌ
In what your wives leave, your share is a half, if they leave no child; but if they leave a child, ye get a fourth; after payment of legacies and debts. In what ye leave, their share is a fourth, if ye leave no child; but if ye leave a child, they get an eighth; after payment of legacies and debts. If the man or woman whose inheritance is in question, has left neither ascendants nor descendants, but has left a brother or a sister, each one of the two gets a sixth; but if more than two, they share in a third; after payment of legacies and debts; so that no loss is caused (to any one). Thus is it ordained by Allah; and Allah is All-knowing, Most Forbearing.
وَالْمُحْصَنَاتُ مِنَ النِّسَاءِ إِلَّا مَا مَلَكَتْ أَيْمَانُكُمْ ۖ كِتَابَ اللَّهِ عَلَيْكُمْ ۚ وَأُحِلَّ لَكُم مَّا وَرَاءَ ذَٰلِكُمْ أَن تَبْتَغُوا بِأَمْوَالِكُم مُّحْصِنِينَ غَيْرَ مُسَافِحِينَ ۚ فَمَا اسْتَمْتَعْتُم بِهِ مِنْهُنَّ فَآتُوهُنَّ أُجُورَهُنَّ فَرِيضَةً ۚ وَلَا جُنَاحَ عَلَيْكُمْ فِيمَا تَرَاضَيْتُم بِهِ مِن بَعْدِ الْفَرِيضَةِ ۚ إِنَّ اللَّهَ كَانَ عَلِيمًا حَكِيمًا
Also (prohibited are) women already married, except those whom your right hands possess: Thus hath Allah ordained (Prohibitions) against you: Except for these, all others are lawful, provided ye seek (them in marriage) with gifts from your property,- desiring chastity, not lust, seeing that ye derive benefit from them, give them their dowers (at least) as prescribed; but if, after a dower is prescribed, agree Mutually (to vary it), there is no blame on you, and Allah is All-knowing, All-wise.
وَمَن لَّمْ يَسْتَطِعْ مِنكُمْ طَوْلًا أَن يَنكِحَ الْمُحْصَنَاتِ الْمُؤْمِنَاتِ فَمِن مَّا مَلَكَتْ أَيْمَانُكُم مِّن فَتَيَاتِكُمُ الْمُؤْمِنَاتِ ۚ وَاللَّهُ أَعْلَمُ بِإِيمَانِكُم ۚ بَعْضُكُم مِّن بَعْضٍ ۚ فَانكِحُوهُنَّ بِإِذْنِ أَهْلِهِنَّ وَآتُوهُنَّ أُجُورَهُنَّ بِالْمَعْرُوفِ مُحْصَنَاتٍ غَيْرَ مُسَافِحَاتٍ وَلَا مُتَّخِذَاتِ أَخْدَانٍ ۚ فَإِذَا أُحْصِنَّ فَإِنْ أَتَيْنَ بِفَاحِشَةٍ فَعَلَيْهِنَّ نِصْفُ مَا عَلَى الْمُحْصَنَاتِ مِنَ الْعَذَابِ ۚ ذَٰلِكَ لِمَنْ خَشِيَ الْعَنَتَ مِنكُمْ ۚ وَأَن تَصْبِرُوا خَيْرٌ لَّكُمْ ۗ وَاللَّهُ غَفُورٌ رَّحِيمٌ
If any of you have not the means wherewith to wed free believing women, they may wed believing girls from among those whom your right hands possess: And Allah hath full knowledge about your faith. Ye are one from another: Wed them with the leave of their owners, and give them their dowers, according to what is reasonable: They should be chaste, not lustful, nor taking paramours: when they are taken in wedlock, if they fall into shame, their punishment is half that for free women. This (permission) is for those among you who fear sin; but it is better for you that ye practise self-restraint. And Allah is Oft-forgiving, Most Merciful.
يَا أَيُّهَا الَّذِينَ آمَنُوا لَا تَقْرَبُوا الصَّلَاةَ وَأَنتُمْ سُكَارَىٰ حَتَّىٰ تَعْلَمُوا مَا تَقُولُونَ وَلَا جُنُبًا إِلَّا عَابِرِي سَبِيلٍ حَتَّىٰ تَغْتَسِلُوا ۚ وَإِن كُنتُم مَّرْضَىٰ أَوْ عَلَىٰ سَفَرٍ أَوْ جَاءَ أَحَدٌ مِّنكُم مِّنَ الْغَائِطِ أَوْ لَامَسْتُمُ النِّسَاءَ فَلَمْ تَجِدُوا مَاءً فَتَيَمَّمُوا صَعِيدًا طَيِّبًا فَامْسَحُوا بِوُجُوهِكُمْ وَأَيْدِيكُمْ ۗ إِنَّ اللَّهَ كَانَ عَفُوًّا غَفُورًا
O ye who believe! Approach not prayers with a mind befogged, until ye can understand all that ye say,- nor in a state of ceremonial impurity (Except when travelling on the road), until after washing your whole body. If ye are ill, or on a journey, or one of you cometh from offices of nature, or ye have been in contact with women, and ye find no water, then take for yourselves clean sand or earth, and rub therewith your faces and hands. For Allah doth blot out sins and forgive again and again.
إِلَّا الَّذِينَ يَصِلُونَ إِلَىٰ قَوْمٍ بَيْنَكُمْ وَبَيْنَهُم مِّيثَاقٌ أَوْ جَاءُوكُمْ حَصِرَتْ صُدُورُهُمْ أَن يُقَاتِلُوكُمْ أَوْ يُقَاتِلُوا قَوْمَهُمْ ۚ وَلَوْ شَاءَ اللَّهُ لَسَلَّطَهُمْ عَلَيْكُمْ فَلَقَاتَلُوكُمْ ۚ فَإِنِ اعْتَزَلُوكُمْ فَلَمْ يُقَاتِلُوكُمْ وَأَلْقَوْا إِلَيْكُمُ السَّلَمَ فَمَا جَعَلَ اللَّهُ لَكُمْ عَلَيْهِمْ سَبِيلًا
Except those who join a group between whom and you there is a treaty (of peace), or those who approach you with hearts restraining them from fighting you as well as fighting their own people. If Allah had pleased, He could have given them power over you, and they would have fought you: Therefore if they withdraw from you but fight you not, and (instead) send you (Guarantees of) peace, then Allah Hath opened no way for you (to war against them).
سَتَجِدُونَ آخَرِينَ يُرِيدُونَ أَن يَأْمَنُوكُمْ وَيَأْمَنُوا قَوْمَهُمْ كُلَّ مَا رُدُّوا إِلَى الْفِتْنَةِ أُرْكِسُوا فِيهَا ۚ فَإِن لَّمْ يَعْتَزِلُوكُمْ وَيُلْقُوا إِلَيْكُمُ السَّلَمَ وَيَكُفُّوا أَيْدِيَهُمْ فَخُذُوهُمْ وَاقْتُلُوهُمْ حَيْثُ ثَقِفْتُمُوهُمْ ۚ وَأُولَٰئِكُمْ جَعَلْنَا لَكُمْ عَلَيْهِمْ سُلْطَانًا مُّبِينًا
Others you will find that wish to gain your confidence as well as that of their people: Every time they are sent back to temptation, they succumb thereto: if they withdraw not from you nor give you (guarantees) of peace besides restraining their hands, seize them and slay them wherever ye get them: In their case We have provided you with a clear argument against them.
إِنَّ الَّذِينَ تَوَفَّاهُمُ الْمَلَائِكَةُ ظَالِمِي أَنفُسِهِمْ قَالُوا فِيمَ كُنتُمْ ۖ قَالُوا كُنَّا مُسْتَضْعَفِينَ فِي الْأَرْضِ ۚ قَالُوا أَلَمْ تَكُنْ أَرْضُ اللَّهِ وَاسِعَةً فَتُهَاجِرُوا فِيهَا ۚ فَأُولَٰئِكَ مَأْوَاهُمْ جَهَنَّمُ ۖ وَسَاءَتْ مَصِيرًا
When angels take the souls of those who die in sin against their souls, they say: "In what (plight) Were ye?" They reply: "Weak and oppressed Were we in the earth." They say: "Was not the earth of Allah spacious enough for you to move yourselves away (From evil)?" Such men will find their abode in Hell,- What an evil refuge.