﴿ ٱللَّهُ نَزَّلَ أَحْسَنَ ٱلْحَدِيثِ كِتَٰبًۭا مُّتَشَٰبِهًۭا مَّثَانِىَ تَقْشَعِرُّ مِنْهُ جُلُودُ ٱلَّذِينَ يَخْشَوْنَ رَبَّهُمْ ثُمَّ تَلِينُ جُلُودُهُمْ وَقُلُوبُهُمْ إِلَىٰ ذِكْرِ ٱللَّهِ ۚ ذَٰلِكَ هُدَى ٱللَّهِ يَهْدِى بِهِۦ مَن يَشَآءُ ۚ وَمَن يُضْلِلِ ٱللَّهُ فَمَا لَهُۥ مِنْ هَادٍ ﴾

“God bestows from on high the best of all teachings in the shape of a divine writ fully consistent within itself, repeating each statement [of the truth] in manifold forms [a divine writ] whereat shiver the skins of all who of their Sustainer stand in awe: [but] in the end their skins and their hearts do soften at the remembrance of [the grace of] God. Such is God’s guidance: He guides therewith him that wills [to be guided] whereas he whom God lets go astray can never find any guide”

God has blessed man with a guidebook in the form of the Quran. It has two special qualities. One of its qualities is that it is marked by utmost consistency. In other words, it is a book which has no contradictions. One part does not clash with another. If the Quran’s statements had not corresponded exactly with reality, there would have been differences between and inconsistencies in its various parts. The second quality of the Quran is its use of repetition, that is, its topics are often repeated in different styles. This quality in the Quran shows that it is a book of advice and guidance. An adviser always wishes that his words should establish themselves firmly in the mind of the hearer. For this purpose, he expresses the same statements in different ways. This wisdom is found in the Quran in its best form. It is the nature of man that when he hears some terrible news, or he undergoes some hair-raising experience, his inner being is humbled and his heart is softened by the news. When a serious man reads the Quran he undergoes such spiritual experiences.