I found out that the story is very similar to a zen story below:
A Cup of Tea
Nan-in, a Japanese master during the Meiji era (1868-1912), received a university professor who came to inquire about Zen.
Nan-in served tea. He poured his visitor's cup full, and then kept on pouring.
The professor watched the overflow until he no longer could restrain himself. "It is overfull. No more will go in!"
"Like this cup," Nan-in said, "you are full of your own opinions and speculations. How can I show you Zen unless you first empty your cup?"
Perhaps the moral of the story is that since we have filled our cups with preconceptions, expectations, prejudices, assumptions, and opinions, we think we already know what is happening and hence not open to hear the truth, but we are projecting our deluded 'truth' to other.
In this case, perhaps there was no 'end of the world' like what Nima thought, the end of the world is when our 'world' ends - when we die. Hence, the master or the Elder monk doesn't seem to fear death or end of the world.