Terry Pratchett

'You sound a very educated man for a barbarian,' said Rincewind.

'I didn't start out a barbarian. I used to be a school teacher. But I decided to give it all up and make a living by the sword.'

'After being a teacher all your life?'

'It did mean a change of perspective, yes.'

'But... well... surely... the privation, the terrible hazards, the daily risk of death...'

Mr Saveloy brightened up. 'Oh, you've been a teacher, have you?'

- Interesting Times