The importance of reflection and contemplation (tafakkur)

بِٱلْبَيِّنَـٰتِ وَٱلزُّبُرِ ۗ وَأَنزَلْنَآ إِلَيْكَ ٱلذِّكْرَ لِتُبَيِّنَ لِلنَّاسِ مَا نُزِّلَ إِلَيْهِمْ وَلَعَلَّهُمْ يَتَفَكَّرُونَ

[We sent them] with clear proofs and written ordinances. And We revealed to you the message [i.e., the Qur’ān] that you may make clear to the people what was sent down to them and that they might give thought.