Yes the take-away from VS 11 seems to be a reminder to always hold in mind the goal of tranquil activity -- that we want to be tranquil without becoming listless, and we want to be active without becoming agitated.
On the original topic, I wanted to point out the fun connection that the word for "school" is the same as "leisure" -- and the word in question is the negation of leisure -- i.e., occupation. This is why the translations diverge a bit at this point.