Source: The Philosopher's Apprentice (2008), Chapter 13 (p. 295)
“Those who can -- do. Those who can't -- teach.”
“Those who can't do, teach. And those who can't teach, teach gym.”
Source: Annie Hall: Screenplay
“Those who know, do. Those that understand, teach.”
This and many similar quotes with the same general meaning are misattributed to Aristotle as a result of Twitter attribution decay. The original source of the quote remains anonymous. The oldest reference resides in the works of George Bernard Shaw, Man and Superman (1903): "Maxims for Revolutionists", where he claims that “He who can, does. He who cannot, teaches.”. However, the related quote, "Those who can, do. Those who understand, teach" likely originates from Lee Shulman in his explanation of Aristotlean views on professional mastery: Source: Shulman, L. S. (1986). Those who understand: Knowledge growth in teaching. Educational Researcher, 15(2), 4 - 14. Stable URL: http://www.jstor.org/stable/1175860
Misattributed
Variant: Those who can, do, those who cannot, teach.
The Road to the Sea, p. 294
2000s and posthumous publications, The Collected Stories of Arthur C. Clarke (2001)
“The authority of those who teach is often an obstacle to those who want to learn.”
“Miracles are proud creatures; they will not reveal themselves to those who do not Believe.”
Signposts to Elsewhere (2008)
