This is a interesting question, we huaman is not 100% robot which means there will be errors sometimes,
So we couldn’t know ourselves 100%
Or some didn’t even notice
But I don’t think i know me 100% because it’s changed everyday your mind , your thought , your attitude your purpose , but i hope
It changed to the good way.
So If im not the person i think i am ,
I will ask him *the person who inside me , what’ news?
Who you truly are?
Try to have a good friendship with him and stay with him in every bad times and good times, notice him and warn him to not do things that will hurt others even myself.