The story is about Mälik ªah 

Mälik ªah was asked:

“You are always calm; those who meet you leave here happy. There is nobody who has seen you who leaves angry. How can you manage to be like this?”  

He replied:

“If the things that I want to be done are carried out, even if I whisper them, why should I become angry? A man fears me when he is in front of me. He knows that he will lose his life, if he does wrong things and he also knows that he will be rewarded if he says good things. How can I threaten those who fear me even without threats? They pray to Allah to give my heart goodness before they come here. They want from me the things that are required by Allah. They approach me, thinking I am a representative of Allah. Should I make them think that the representative of Allah in the world is very bad?

(185-186.)