إن القرآن ظاهره أنيق وباطنه عميق لا تفنى عجائبه ولا تنقضي غرائبه ولا تكشف الظلمات إلا به
Quran has a splendid exterior and an obscure interior. Its wonders don’t end, its marvels don’t finish, and darkness can only by illuminated by it.
“Splendid exterior” means eloquent words and verses. “Obscure interior” means deep meaning and several layers of interpretation.
Imam Ali tells you that if you want to come out of darkness which surrounds your life, then the only guide which you can use is Quran.