6 Preface يولِجُ اللَّيلَ فِي النَّهارِ وَيولِجُ النَّهارَ فِي اللَّيلِ ۚ وَهُوَ عَليمٌ بِذاتِ الصُّدورِYusuf AliHe merges Night into Day, and He merges Day into Night; and He has full knowledge of the secrets of (all) hearts.