Not about many things, but about this:
“Insanity is doing the same thing, over and over again, but expecting different results.”
I’ve always hated this definition.
I wouldn’t call it insanity. I’d call it persistence. Grit. Determination. Practice.
There are many examples in life in which one does the same thing over and over again with the reasonable expectation of improvement (and thus differing results).
In fact, I can think of more instances in which this is true than it is not.
I’m sure that when Einstein said this, he was referring to a specific instance where this definition aptly applied (probably related to scientific experimentation), but too often quoted as a universal truth when this is simply not the case.