Continuing on with this series, I am unfortunately not done talking about the religion in Final Fantasy X. I’ve already gone over what Yevon is, but I have not talked about what it entails. Or rather, I haven’t talked about its foundation in detail. And just as a warning, while my other posts have had spoilers in them, this one will have a lot more.
Anyway, if you want to continue reading, Yevon is centered on the aeons, which are essential in order for summoners to defeat Sin. Most simply, aeons are powerful creatures that summoners can summon and control at will, but it is more complicated than that. I’ve already gone over both the portrayal of religion and the dead, which are also essential to understanding what the aeons actually are. A dead person is comprised of pyreflies, which act as a soul, more or less. Sometimes dead people will become angry and turn into monsters, while other times, they’ll manifest as ghosts. And in keeping with the general theme of Final Fantasy X, aeons also come from the dead, though aeons themselves are not dead. More accurately, they’re the manifestation of dreams of the dead.
While some dead people become fiends and others become ghosts, a small few will become fayths. Fayths are people who died willingly and had their souls forever trapped inside stone statues. Every Yevon temple in Spira has at least one statue. When summoners travel to the different temples, they enter something called The Cloister of Trials. Once completing that task, a summoner may enter The Chamber of the Fayth, where he or she can pray to the fayth’s statue for a way to defeat Sin. If the fayth answers the summoner’s prayers, the fayth will then grant that summoner its aeon. Summoners must train by praying at temples and obtaining as many aeons as possible or they will never become strong enough to gain the power of the Final Aeon, which is the only aeon that can defeat Sin.
It is the aeons that are responsible for both destroying Sin and rebirthing it over and over again. Unfortunately, like every other good idea in this game, something has to ruin it. So besides Yevon using machina, what I’m about to talk about is the other incredibly large plot hole that could have very easily been fixed.