A company of philosophers were discussing a subject in the palace of Kesra and Barzachumihr, having remained silent, they asked him why he took no share in the debate. He replied: "Veziers are like physicians and the latter give medicine to the sick only but, as I perceive that your opinions are in conformity with propriety, I have nothing to say about them."

 When an affair succeeds without my idle talk 
 It is not meet for me to speak thereon. 
 But if I see a blind man near a well 
 It is a crime for me to remain silent.