The names of the Qur’an:

Allah says:

]الم. ذَلِكَ الْكِتَابُ لاَ رَيْبَ فِيهِ هُدًى لِّلْمُتَّقِين[
(البقرة: 1 - 2)

This means: “Alif-Lam-Mim. (These letters are one of the miracles of the Qur'an and none but Allah (Alone) knows their meanings.). This is the Book (the Qur'an), whereof there is no doubt, a guidance to those who are Al-Muttaqun (the pious and righteous persons who fear Allah much).” (2, Al-Baqarah: 1 - 2)

Allah says:

]إِنَّا نَحْنُ نَزَّلْنَا الذِّكْرَ وَإِنَّا لَهُ لَحَافِظُون[
(الحجر: 9)

This means: “Surely We, even We, have been sending down the Remembrance and surely We are indeed Preservers of it.” (15, Al-Hijr: 9)

Allah says:

]َتبَارَكَ الَّذِي نَزَّلَ الْفُرْقَانَ عَلَى عَبْدِهِ لِيَكُونَ لِلْعَالَمِينَ نَذِيرًا[
(الفرقان: 1)

  This means: “Blessed be He Who sent down the criterion (of right and wrong, i.e. this Qur'an) to His slave (Muhammad SAW) that he may be a warner to the 'Alamin (mankind and jinns).” (25, Al-Furqan: 1)

The attributes of the Qur’an:

Allah says:

]قَدْ جَاءكُم بُرْهَانٌ مِّن رَّبِّكُمْ وَأَنزَلْنَا إِلَيْكُمْ نُورًا مُّبِينًا[
(النساء: 174)

This means: “Verily, there has come to you a convincing proof (Prophet Muhammad SAW) from your Lord, and We sent down to you a manifest light (this Qur'an).” (4, An-Nisa’: 174)

Allah says:

]يَا أَيُّهَا النَّاسُ قَدْ جَاءتْكُم مَّوْعِظَةٌ مِّن رَّبِّكُمْ وَشِفَاء لِّمَا فِي الصُّدُورِ وَهُدًى وَرَحْمَةٌ لِّلْمُؤْمِنِين[
(يونس: 57)

This means: “O mankind! There has come to you an admonition from your Lord (i.e. the Qur'an, ordering all that is good and forbidding all that is evil), and a healing for that (disease of ignorance, doubt, hypocrisy and differences, etc.) in your breasts, - a guidance and a mercy (explaining lawful and unlawful things, etc.) for the believers.” (10, Yunus: 57)

Allah says:

]إِنَّا أَرْسَلْنَاكَ بِالْحَقِّ بَشِيرًا وَنَذِيرًا وَلاَ تُسْأَلُ عَنْ أَصْحَابِ الْجَحِيمِ[
(البقرة: 119)

This means: “Verily, We have sent you (O Muhammad (peace be upon him)) with the truth (Islam), a bringer of glad tidings (for those who believe in what you brought, that they will enter Paradise) and a warner (for those who disbelieve in what you brought, they will enter the Hell-fire). And you will not be asked about the dwellers of the blazing Fire.”
 (2, Al-Baqarah: 119)

Allah says:

]كِتَابٌ أَنزَلْنَاهُ إِلَيْكَ مُبَارَكٌ لِّيَدَّبَّرُوا آيَاتِهِ وَلِيَتَذَكَّرَ أُوْلُوا الأْلْبَابِ[
(ص: 29)

This means: “(This is) a Book (the Qur'an) which We have sent down to you, full of blessings that they may ponder over its Verses, and that men of understanding may remember.” (38, Sad: 29)

The wisdom of revealing the Qur’an at intervals:

Allah says:

]وَقَالَ الَّذِينَ كَفَرُوا لَوْلا نُزِّلَ عَلَيْهِ الْقُرْآنُ جُمْلَةً وَاحِدَةً كَذَلِكَ لِنُثَبِّتَ بِهِ فُؤَادَكَ وَرَتَّلْنَاهُ تَرْتِيلاً[ (الفرقان: 32)

This means: “And those who disbelieve say: "Why is not the Qur'an revealed to him all at once?" Thus (it is sent down in parts), that We may strengthen your heart thereby. And We have revealed it to you gradually, in stages. (It was revealed to the Prophet SAW in 23 years.)”
(25, Al-Furqan: 32)

The ways of revelation:

Allah says:

]وَمَا كَانَ لِبَشَرٍ أَن يُكَلِّمَهُ اللَّهُ إِلا وَحْيًا أَوْ مِن وَرَاء حِجَابٍ أَوْ يُرْسِل رَسُولا فَيُوحِيَ بِإِذْنِهِ مَا يَشَاء إِنَّهُ عَلِيٌّ حَكِيمٌ[
(الشورى: 51)

This means: “It is not given to any human being that Allah should speak to him unless (it be) by Inspiration, or from behind a veil, or (that) He sends a Messenger to reveal what He wills by His Leave. Verily, He is Most High, Most Wise.” (42, Ash-Shura: 51)

* Al-Harith Ibn Hisham narrated that he asked Allah’s Prophet (peace be upon him), ‘O Allah's Prophet! How is the Divine Inspiration revealed to you?’ Allah's Prophet (peace be upon him) replied, ‘Sometimes it is (revealed) like the ringing of a bell, this form of Inspiration is the hardest of all and then this state passes off after I have grasped what is inspired. Sometimes, the angel comes in the form of a man and talks to me and I grasp what he says.’” (Reported by Al-Bukhari and Muslim)