Clinically AND culturally PC is just a dead-end trap, and we are hopefully the first to recognize that.
I totally believe it makes a difference (a really practical tangible difference) in how well we do, WILL do...
To have an internal definition in place and repeat it to ourselves.
Otherwise we must keep reconciling the "normal" world's definitions of us and what we do, to our own reality.
Example: success and failure in school was part mental clarity (so you can take in ideas and then make mental leaps of learning and innovative thinking) -- and mental clarity sometimes just takes the day off;
part waking up on time, staying alert in class, and staying awake during study -- the world calls this disciplined application to learning, we call it a physical impossibility (unless provisions are made and we have some help)
part showing up in class all semester, which we have no power on earth to do. less-physically-able is a fact of life for us, no use calling it "character" or "self-discipline".
I havent used these for more than 2 years, but here are some:
* I know how this sounds, but this is the best I can do. I know what it costs me and how bad I want it, you dont. Take my word for it, I KNOW this is my best effort.
* Woke up this morning, and it did NOT go away, it is NOT all better. Believe me, I checked.
* YOU cannot possibly be as motivated as I am, you cannot know what I have tried, what I have found out, or what I think about ALL THE TIME; Trust me, I want to find improvement more than anyone ever wanted anything.
* This is not "easier", "lazier", or somehow more satisfying that a life of hard work and success. Dont be ridiculous. I would have to be a psycho to want this somehow.