Thats deep.


However, that doesn't explain why Bevelle still kept using Machina while denying others the use of Machina.
This may have been to stop normal people from developing machina to destroy Sin, as it could turn out to be like the Vegnagun incident. Yevon still used machina, but because they knew what happens abusing it's powers, they just make non-AI machina.

And now that I think about it, why didn't Jecht just stab himself, jump down from the Zanarkand platform, kill himself or let the party kill you?
Because in the sequence before the fight, he says: "I won't be able to hold myself back." He is completely consumed by Sin, and loses himself.

Now that you mention it, I may as well ask some questions that have been in the back of my mind for a while.

1: Why does Wakka call machina 'machines' at the start of the game talking to Tidus? Nobody else calls them machines throughout the game, and he would assume that Tidus is from Spira, and know what machina are.

2: How did Jecht get to Spira? Tidus says "He went out for training one day, and never came back." So Jecht is in the sea, and 'pop', he is in Spira.