Quote Originally Posted by Tabris View Post
He knew that the guardian who turned into the Final Aeon would die, and he knew that Braska would die - this is common knowledge for all Yevonites. He had no knowledge of the machina deep down in the Bevelle, neither did he know of the corrupt Maesters. So I disagree with the statement that Auron knew the truth about the Yevon church prior to Yuna's pilgrimage.
Have to disagree. It was common knowledge that the summoner would die after the Final Aeon done its job, but it was not common knowledge that Yunalesca was the one to do the ritual, and it wasnt common knowledge that a guardian had to be the final aeon, everyone but Auron is shocked. Auron was also friends with one of the Maesters before he was a maester and has shown his disgust at the idea, and he would have known about the machina in bevelle because he's been there already with Braska (although he wouldnt have known about the machina part in FFX-2 but the game wasnt planned when they where still making FFX).

In my opinion, up untill the battle with Yunalesca, he knows what is going on. After that he's with the rest of the gang, unsure how to kill Sin but going with his original goal to break the cycle anyway. That was the point of him becomming Yunas guardian.