﴿ وَمَآ أَنتَ بِهَٰدِى ٱلْعُمْىِ عَن ضَلَٰلَتِهِمْ ۖ إِن تُسْمِعُ إِلَّا مَن يُؤْمِنُ بِـَٔايَٰتِنَا فَهُم مُّسْلِمُونَ ﴾

“just as thou canst not lead the blind [of heart] out of their error; none canst thou make hear save such as [are willing to] believe in Our messages, and thus surrender themselves unto Us.”

nor can you lead the blind out of their error. You can only make those hear — hear so as to comprehend and accept — who believe in Our signs — the Qur’ān — and have therefore submitted are therefore sincere in their affirmation of God’s Oneness.