The Jedi Order tried imposing strict rules on the use of the Force, our lives, and everything we did in an effort to eliminate the use of the Dark Side. Still, members of the Order defied it and fell to the Dark Side's lure. Sometimes they were defeated and recovered their sanity, sometimes they weren't. The toll taken by the people who assumed the name of "Sith" has more or less destroyed the Order itself by now, although the Sith destroyed themselves in turn.

Well, the Sith and myself, but I'm not too proud of it.