"I have never, in all my life, done anything as hard, just in terms of being tiring, exhausting and mind- and body consuming, as teaching. it is one of the most extraordinarily har jobs you could ever do. Somehow your body gets used to it, but after the first three days I was very, very minded to run away.
I didn't. I stayed the course and, in fact, I continued to go back to that school to teach while I was at university.
"Sources: As given + pic.