The Fire in Hell

Once upon a time, a sage wanted to teach a new lesson to his pupil. He gave the bowl of his hookah to him and said:

Dear friend! could you please go to hell and bring me some fire for my hookah? 

His young companion took the bowl and went to hell and came back but with no fire:

I was looking for a piece of coal in the hell. I searched all floors but I could not find any fire because everyone was burning in the fire of their actions, not coal.