﴿ كَيْفَ يَهْدِى ٱللَّهُ قَوْمًۭا كَفَرُوا۟ بَعْدَ إِيمَٰنِهِمْ وَشَهِدُوٓا۟ أَنَّ ٱلرَّسُولَ حَقٌّۭ وَجَآءَهُمُ ٱلْبَيِّنَٰتُ ۚ وَٱللَّهُ لَا يَهْدِى ٱلْقَوْمَ ٱلظَّٰلِمِينَ ﴾

“How would God bestow His guidance upon people who have resolved to deny the truth after having attained to faith, and having borne witness that this Apostle is true, and [after] all evidence of the truth has come unto them? For, God does not guide such evildoing folk.”

Not acknowledging any truth external to their community appears to be a bid to save their faith. But in actuality it destroys their faith. God’s true believer lives on God’s continuous inspiration, so that one who confines himself to self-worship and community-worship will be blocking all paths to God’s blessing entering into him. After being deprived of God’s inspiration, what will there be left with which to nurture his faith?