A man was fishing at a pond. He sat patiently waiting for the fish to bite, and he had caught several fish already.
Another fisherman came. His line got tangled on some lotus roots in the pond. He tugged angrily, and as a result he snapped his fishing line, so he went away with nothing.
A third fisherman grew impatient. He cursed the pond and all the fish in it, yelling loudly, and then he broke his fishing rod in two and threw it into the pond. He also went away with nothing.
The first man just kept on fishing.
Inspired by: Come to the Secret Garden: Sufi Tales of Wisdom by M. R. Bawa Muhaiyaddeen
Notes: This story is on p. 13 of the book. Bawa Muhaiyaddeen's parable goes into much more detail including people who come to the pond for water in addition to coming to the pond to fish.