Its quoted so often that it is now a cliche' – Einstein's comment about insanity being a function of doing the same thing, yet hoping against hope for some different result.
I believe we are seriously blind to this in ourselves; yet it is SO easy to see in others. I talked with several people recently who have told me the same story dozens of times … things that happen repeatedly in their lives. There were many tears and pleas for different outcomes. But there never will be. Not until they do something, anything differently than they are doing now. The new thing does not guarantee the desired outcome, but to do the same ensures a familiar and dismal result.
If you are frustrated with something / someone … DO SOMETHING DIFFERENT.
(Sorry for the shouting. Just DONE with same story, same results). I'm speaking to me too, btw.