Critical thinking in faith

أَفَلَمْ يَدَّبَّرُوا۟ ٱلْقَوْلَ أَمْ جَآءَهُم مَّا لَمْ يَأْتِ ءَابَآءَهُمُ ٱلْأَوَّلِينَ

Then have they not reflected over the word [i.e., the Qur’ān], or has there come to them that which had not come to their forefathers?