6 Preface يولِجُ اللَّيلَ فِي النَّهارِ وَيولِجُ النَّهارَ فِي اللَّيلِ ۚ وَهُوَ عَليمٌ بِذاتِ الصُّدورِAhmed AliHe turns night into day, and turns day into night; and He knows whatsoever is in your hearts.