individual responsibility in faith

إِنَّ فِى ذَٰلِكَ لَذِكْرَىٰ لِمَن كَانَ لَهُۥ قَلْبٌ أَوْ أَلْقَى ٱلسَّمْعَ وَهُوَ شَهِيدٌ

Indeed in that is a reminder for whoever has a heart or who listens while he is present [in mind].