The Messenger grieving by the Statements of the Polytheists, and His Gratification

This statement of Allah, the Exalted, to His Messenger comforted the worries that the polytheists were causing him due to their statements directed towards him. This is just as Allah says about them,

وَقَالُواْ مَا لِهَـذَا الرَّسُولِ يَأْكُلُ الطَّعَامَ وَيَمْشِى فِى الاٌّسْوَاقِ لَوْلا أُنزِلَ إِلَيْهِ مَلَكٌ فَيَكُونَ مَعَهُ نَذِيراً - أَوْ يُلْقَى إِلَيْهِ كَنْزٌ أَوْ تَكُونُ لَهُ جَنَّةٌ يَأْكُلُ مِنْهَا وَقَالَ الظَّـلِمُونَ إِن تَتَّبِعُونَ إِلاَّ رَجُلاً مَّسْحُوراً

The reason is that they were first asked to bring ten Surahs. They failed to do so. Then, to make their inability look more pronounced, it was said in the verse of Surah al-Baqarah quoted above: If you take the Qur'an to be a word of man, then, you too, bring no more than just one Surah being the like of it. But, despite this challenge of the Qur'an, made so easy for them, they could do nothing. It stood proved that the Holy Qur'an was a miracle, and the Word of Allah without any doubt. Therefore, at the end, it was said: , that is, 'would you now believe and obey, or would you prefer to remain heedless as before?'