6 Preface إِنَّ فِي اختِلافِ اللَّيلِ وَالنَّهارِ وَما خَلَقَ اللَّهُ فِي السَّماواتِ وَالأَرضِ لَآياتٍ لِقَومٍ يَتَّقونَYusuf AliVerily, in the alternation of the night and the day, and in all that God hath created, in the heavens and the earth, are signs for those who fear Him.1Cf. 2:164.