“I’ve never understood that phrase. William Shakespeare. Niels Bohr. Bruce Lee. James D. Watson. Michael Faraday. Stephen King. Bill Clinton. All of them teachers who were famous for work in their respective fields.
“But beyond that: isn’t the music teacher who picks up a cello and shows her pupil who to tune the strings doing? Doesn’t the very act of her playing the music as example, and being able to bring others into competence with the technical proficiency, demonstrate her ability to ‘do?’
“But beyond them: Jesus Christ was a teacher. He was, so I’ve read, also God. If teachers can’t ‘do,’ and God is omnipotent, and ‘omnipotence’ is the ability to do anything to the utmost– isn’t there a grievous flaw in someone’s claim?
“Since adolescence, ‘Those who can’t do, teach’ has struck me as the refrain of the student who can’t do. Usually, it’s of the student who can’t ‘do’ up to a teacher’s standards. You hate this authority figure, and so they must fail at what they’re passionate about, not based on evidence, but based on your disdain. Invention of someone else’s flaws to make ourselves feel better is something we can all do.”