@Olivier5,
A very good, but long tale. I prefer the Christian enjoiner that we "do unto others as we would have them do to ourselves". There are versions of this in the literature of other religions as well. It lacks the (very effective) downstream consequential warnings of your cited tale, but is briefer and, I think, a bit more eloquent.
I recall here the Jesuit definition of eloquence.... "clarity, brevity and poetry".