Lesson Zero has always been treated as the episode Twilight Sparkle Goes Crazy, not the episode Twilight Sparkle suffering from a Mental Disorder. I found no life lesson in this episode. The stuff I found out if the episode never existed or was planned out differently or was explained Crazy Twilight Sparkle would have not become a thing. Well, the same idea all the Mane 6 and their infamous episodes. The Life lesson is to throw out the window over we can turn this character into screw-up crap, etc. Fandubs, etc of Crazy Twilight Sparkle. Yeah, Crazy Twilight Sparkle never existed all related to a mental disorder.