I loved teaching high school math. I was blessed with a career that brought me happiness. I cried when I retired and still miss it but, it was a job, not a calling.
I worked for that paycheck and if it wasn't there I would have been out the door.
I don't know why the lawyer pictured above is now teaching algebra but I am willing to bet no "higher authority" called him there. He would not be doing it without the bimonthly deposit in his bank account.
(Picture from an ad on the F train)