62وَهُوَ الَّذي جَعَلَ اللَّيلَ وَالنَّهارَ خِلفَةً لِمَن أَرادَ أَن يَذَّكَّرَ أَو أَرادَ شُكورًا(Irfan-ul-Quran)And He is the One Who made the day and the night rotate after each other for him who desires to contemplate or intends to be grateful. (There is direction and guidance in these creative powers.)