Originally Posted by
zooloo
I believe the original to be...
He who can, does. He who cannot, teaches.
Man and Superman (1903) "Maxims for Revolutionists"
George Bernard Shaw.
Thanks, this is interesting news for me. I also find it interesting that the phrasing and context of this original comes across as affirmational of teaching, while the modern equivalents come across as derogatory against teachers.
To me the above implies external factors preventing one from taking action, while the modern versions seem to imply internal lack of ability.