اللَّهُ نَزَّلَ أَحْسَنَ الْحَدِيثِ كِتَابًا مُّتَشَابِهًا مَّثَانِيَ تَقْشَعِرُّ مِنْهُ جُلُودُ الَّذِينَ يَخْشَوْنَ رَبَّهُمْ ثُمَّ تَلِينُ جُلُودُهُمْ وَقُلُوبُهُمْ إِلَىٰ ذِكْرِ اللَّهِ ۚ ذَٰلِكَ هُدَى اللَّهِ يَهْدِي بِهِ مَن يَشَاءُ ۚ وَمَن يُضْلِلِ اللَّهُ فَمَا لَهُ مِنْ هَادٍ (23)
(39:23) Allah has revealed the best teaching, a self-consistent Book *43 which repeats its contents in manifold forms whereat shiver the skins of those that hold their Lord in awe, and then their skins and their hearts soften for Allah's remembrance. That is Allah's Guidance wherewith He guides whosoever He pleases. And he whom Allah does not guide to the Right Path has none to guide him.
*43) That is, there is no contradiction and disagreement between them. The whole Book, from the beginning to the end, projects one and the same aim, one and the same belief, and one and the same system of thought and action. Each of its parts confirms and supports and explains the other themes; and there is perfect consistency in it both in meaning and in style.