Those who can, do. Those who can't, teach.(redirected from those who can do, those who can't teach)
Those who can, do. Those who can't, teach.
Those who are especially skilled in a certain field or area will be able to pursue a career, while those who are less skilled will end up teaching about it instead. A: "I know he always aspired to be a great novelist, but the last I heard he's still teaching middle school English." B: "Well, those who can, do; those who can't, teach."