Just for the filly things they are just tales on how to earn a cutie mark
This theory is that mlp cast is dead
Twilight denial: lesson zero
Flutter shy anger:putting your hoove down
Applejack and rainbow dash bargaining: super speedy squeezy 3000
Rarity depression: sister hooves social
Pinkie pie acceptance: every episode she accepted her fate and acts all happy
Aging is the time they have been dead
And the other ponies are souls of the dead ponies
And the villains are demons