One of the better definitions of insanity - doing the exact same thing over and over and expecting the result to be different.

Einstein wrote that insanity is doing the same thing over and over and expecting a different result. That said, is it crazier to repeatedly throw yourself against a window, or to repeatedly open that window, believing the creatures that are throwing themselves against it might come into your house, take a look around, and leave with no hard feelings?

To paraphrase Einstein, insanity is expecting employees to do one thing while rewarding them for doing something else.

Do you know what Albert Einstein's definition of insanity was?"
"No."
"Doing the same thing over and over and expecting different results.

Unfortunately, Susan didn't remember what Jane Fulton once said, 'Insanity is doing the same thing, over and over again, but expecting different results.

She’d read somewhere that the definition of crazy was doing the same thing over and over but expecting different results.