"Those who can't 'do,' teach."

Lies. Lies and the lying liars that proliferate these lies have got to hit the road.

This might be true when it comes to gym teachers who didn't make it onto American Gladiators, but for everything else, it's just malarkey. I often have found that the best performers (regardless of their crafts) make the best teachers. Honestly, I wouldn't and don't trust a teacher who hasn't ever gone out for the big leagues, either metaphorically or literally speaking. And while I'm seeking out definites, I know for sure that a lot of people who can "do," can't teach. Whichever way the wind blows, teaching, in it's complete glory, is a form of doing.