Allah confers a great favor on His creatures in what He has sent down of the Gracious Qur'an to His Noble Messenger . He said:

﴿يَأَيُّهَا النَّاسُ قَدْ جَآءَتْكُمْ مَّوْعِظَةٌ مَّن رَّبِّكُمْ﴾

(O mankind! There has come to you good advice from your Lord.) A warning and a shield from shameful deeds.

﴿وَشِفَآءٌ لِّمَا فِى الصُّدُورِ﴾

(and a cure for that which is in your breasts,) A cure from suspicion and doubts. The Qur'an removes all the filth and Shirk from the hearts.

﴿وَهُدًى وَرَحْمَةٌ﴾

(a guidance and a mercy) The guidance and the mercy from Allah are attained through it. This is only for those who believe in it and have firm faith in what it contains. As Allah said:

﴿وَنُنَزِّلُ مِنَ الْقُرْءَانِ مَا هُوَ شِفَآءٌ وَرَحْمَةٌ لِّلْمُؤْمِنِينَ وَلاَ يَزِيدُ الظَّـلِمِينَ إَلاَّ خَسَارًا ﴾

(And We send down of the Qur'an that which is a cure and a mercy to those who believe, and it increases the wrongdoers nothing but loss.) (17:82) and;

﴿قُلْ هُوَ لِلَّذِينَ ءَامَنُواْ هُدًى وَشِفَآءٌ﴾

(Say: "It is for those who believe, a guide and a cure.'') (41: 44) Allah then said:

﴿قُلْ بِفَضْلِ اللَّهِ وَبِرَحْمَتِهِ فَبِذَلِكَ فَلْيَفْرَحُواْ﴾

(Say: "In the bounty of Allah, and in His mercy; therein let them rejoice.'') rejoice in what has come from Allah. Let them rejoice in the guidance and the religion of the truth. It is better than anything they might rejoice in,

﴿هُوَ خَيْرٌ مِّمَّا يَجْمَعُونَ﴾

That is better than what (the wealth) they amass. from the ruins of the world and its vanishing bloom undoubtedly.

﴿قُلْ أَرَأَيْتُمْ مَّآ أَنزَلَ اللَّهُ لَكُمْ مِّن رِّزْقٍ فَجَعَلْتُمْ مِّنْهُ حَرَامًا وَحَلاَلاً قُلْ ءَآللَّهُ أَذِنَ لَكُمْ أَمْ عَلَى اللَّهِ تَفْتَرُونَ - وَمَا ظَنُّ الَّذِينَ يَفْتَرُونَ عَلَى اللَّهِ الْكَذِبَ يَوْمَ الْقِيَـمَةِ إِنَّ اللَّهَ لَذُو فَضْلٍ عَلَى النَّاسِ وَلَـكِنَّ أَكْثَرَهُمْ لاَ يَشْكُرُونَ ﴾

(59. Say: "Tell me, what provision Allah has sent down to you! And you have made of it lawful and unlawful.'' Say: "Has Allah permitted you (to do so), or do you invent a lie against Allah'') (60. And what think those who invent a lie against Allah, on the Day of Resurrection Truly, Allah is full of bounty to mankind, but most of them are ungrateful.)