[مبعث الرسل :] بَعَثَ اللهُ رُسُلَهُ بِمَا خَصَّهُمْ بِهِ مِنْ وَحْيِهِ، وَجَعَلَهُمْ حُجَّةً لَهُ عَلَى خَلْقِهِ، لِئَلاَّ تَجِبَ الْحُجَّةُ لَهُمْ بِتَرْكِ الاْعْذَارِ إِلَيْهِمْ، فَدَعَاهُمْ بِلِسَانِ الصِّدْقِ إِلَى سَبِيلِ الْحَقِّ. أَلاَ إِنَّ اللهَ قَدْ كَشَفَ الْخَلْقَ كَشْفَةً، لاَ أَنَّهُ جَهِلَ مَا أَخْفَوْهُ مِنْ مَصُونَ أَسْرَارِهِمْ وَمَكْنُونِ ضَماَئِرِهمْ، وَلكِنْ لِيَبْلُوَهُمْ ﴿أَيُّهُمْ أَحْسَنُ عَمَلًا﴾، فَيَكُونَ الثَّوَابُ جَزَاءً، وَالْعِقَابُ بَوَاءً
Allāh deputed prophets and distinguished them with His revelation. He made them as pleas for Him among His creation, so that there should not remain any excuse for people. He invited people to the right path through a truthful tongue. You should know that Allāh fully knows creation. Not that He was not aware of what they concealed from among their hidden secrets and inner feelings, but in order to try them as to “..which of them performs the best deeds” (18:7), so that there is reward in respect of good acts and chastisement in respect of evil acts.