وَمَا كَانَ لِنَفْسٍ أَن تُؤْمِنَ إِلاَّ بِإِذْنِ اللّهِ وَيَجْعَلُ الرِّجْسَ عَلَى الَّذِينَ لاَ يَعْقِلُونَ
[10:100]
And it is not for a soul to believe except by Allah's permission; and He casts uncleanness on those who will not understand.
No soul can believe, except by the will of Allah, and He will place doubt (or obscurity) on those who will not understand.
It is not for any soul to believe save by the permission of Allah. He hath set uncleanness upon those who have no sense.