Adhere  to  the Book of Allah, because it is the strong rope,clear light, benefitting cure, quenching for thirst, protection  for  the adherent and deliverance  for  the attached.It does not curve so as to need straightening  and does not deflect so as to be corrected. Frequency of  its  repitition and its falling on the ears does not make it old. Keep Allah in mind regarding the Quran. No one should excel you in acting  upon it. (Nahjul Balagha, Letter no.47, and sermon no.156).