Actually some say insanity and others say stupidity but I'll go with stupidity..since it serves my post better :)
This quote is definitely true in the world of physics, but ...
Sometimes you may keep doing the same things over and over again expecting that the time will come when “whoever” is in front of you would realize or notice what you are doing and more importantly why.... after all improving a certain situation or changing the way things are with people should start with one’s self.
Having hope, faith and the will to change is not stupid, but it’s rather “whoever” that sadly earns this title when they fail to respond adequately...
As for the kind of folks who press the elevator button 10 times in a row or try to keep the city clean...well... at least they are not quitters :)