﴿ إِنَّ ٱلَّذِينَ كَفَرُوا۟ وَمَاتُوا۟ وَهُمْ كُفَّارٌۭ فَلَن يُقْبَلَ مِنْ أَحَدِهِم مِّلْءُ ٱلْأَرْضِ ذَهَبًۭا وَلَوِ ٱفْتَدَىٰ بِهِۦٓ ۗ أُو۟لَٰٓئِكَ لَهُمْ عَذَابٌ أَلِيمٌۭ وَمَا لَهُم مِّن نَّٰصِرِينَ ﴾

“Verily, as for those who are bent on denying the truth and die as deniers of the truth - not all the gold on earth could ever be their ransom. It is they for whom grievous suffering is in store; and they shall have none to succour them.”

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?