I think Jerry Perry said it best in his reflection "Glass of Water: Self Destruction." This episode was great, right up until the end where Luna explains she created the monster of this episode. Let me explain. MLP:FIM has a tendency to teach important lessons to its young audience. This was not one of those episodes. At first, we thought it was an endearing tale that was a metaphor for the effects of depression, represented by the monster infecting Luna's dreams which she requires the Mane 6's help to defeat it. But this beautiful metaphor that would have explained how people (especially young people) with depression should seek help from their friends in combating the illness - because that's what depression is, an illness (like cancer). But this all falls to pieces when she reveals that she created the monster herself to punish her for the crimes she committed as one of the series previous antagonists. The show made it out like this was some sort of endearing trait to make us want to love and cuddle Luna because of how much pain she's putting herself through. Which is a terrible lesson to tell kids. If you know someone is harming themselves, as Jerry Perry stated, you drag them to a hospital - regardless of whether or not they hate you forever. The episode teaches that something like depression and by extension self-harm is an acceptable character trait. And not only that, treats it like it's something that has a quick-fix solution to it. This is NOT OK!