Old souls are very patient. :-)
I think the ex<x>pression usually means someone that is unusually understanding, wise, empathetic, loving... so, if that fits you, good . . . use that old soul to help and be kind to others. If old soul means a cantankerous curmudgeon then, stay indoors and leave people alone.
the opposite of understanding or empathetic, someone that, as they get older they get cranky and disagreeable.
I am also an old soul. don't know how to explain it but I know I am. I just live my life.
In my opinion, we're all composed of atoms from the Big Bang, so we're all old. I'm not sure how to guide you as far as doing something about it, though.
My answer wasn't meant to belittle you, sheenybean. I'm entirely serious. We're all old souls and we're all teachers. I'm sorry you assumed I don't know anything or don't listen to anyone.
Centrum Silver for the Soul?