Twilight’s quote from Bridle Gossip
“Supernaturals”? Spike, the word supernatural refers to things like ghosts and spirits and zombies, which are as make-believe as curses. This book is just a bunch of hooey!
and Discord being identified by Celestia as the Spirit of Disharmony in season 2 interact strangely. Season 1 in particular portrayed Twilight to be much more ignorant of her world than she suspected.
We know that Harmony is a tangible thing that makes up their world, but my idea is that Chaos is just as much a part of the fabric of their reality, hence there being a spirit to embody it. It’s only bad in the Paracelsus sense when Discord goes out of control and there’s too much of it. But too little could be just as dangerous. It’s always seemed to me that in her own way, Twilight is potentially as threatening as Discord. If Chaos is really a fundamental force of nature in their world, then the strict order Twilight would impose if she only had the power would cause the world to grind to a halt, with no change or evolution possible. If season 3 or earlier Twilight had replaced Celestia, Equestria would be micromanaged to the last minutia.
The fact that she sealed away magic, destroyed Equestria, and caused G5 bears out my assessment of her, even if it doesn’t confirm or contradict my take on Equestria’s metaphysics.