Surah Al Mu'minun Tafseer

أَمْ يَقُولُونَ بِهِ جِنَّةٌ

Or they say:There is madness in him,

This is a narration of what the Quraysh said about the Prophet.

They said that he was making up the Qur'an by himself, or that he was crazy and did not know what he was saying.

Allah tells us that their hearts did not believe that, they knew that what they were saying about the Qur'an was falsehood, for it had come to them from the Words of Allah and could not be resisted or rejected. So Allah challenged them and all the people of the world to produce something like it if they could -- but they could not and would never be able to do so.

So Allah says:

بَلْ جَاءهُم بِالْحَقِّ وَأَكْثَرُهُمْ لِلْحَقِّ كَارِهُونَ

Nay, but he brought them Al-Haqq, but most of them are averse to the truth.

Truth does not follow Whims and Desires

Allah says