from Amir al-Mu’minin (a.s.). “Know that to establish companionship with the scholar and to follow him is a religion on account of which Allah will grant rewards. Obedience to the scholar is the means to gain goodness and to delete evil deeds. It is the most valuable treasure for the believers. It is dignifying progress in their life time and after their death because of it people will speak of him with praise and virtue .”