From A PERDEVT Lecture

So for our Personality Development class (yes, this class exists) we were talking about the golden rule and about karma. I'm not a believer of karma but that isn't the point. We come across this quote that struck me: "Don't expect from others what you yourself are not                                                                     willing to do."
So tell me what's worse,  disappointment at something you shouldn't even be disappointed about or disappointment rooting from being willing to do too much for someone?