After Chapter 3

In this chapterAt Bevelle, the party is condemned and learns that Yevon has lied for a thousand years.

In Bevelle the party is judged by the temple. They learn that Yevon has hidden the truth: the Final Summoning requires the summoner to sacrifice a guardian, who becomes the new Sin. Yuna and the party decide to find another way. They climb Mount Gagazet toward Zanarkand. The revelation is the game's moral heart. The pilgrimage is a cycle of sacrifice that cannot end, and Yuna chooses to break it.

The party's decision to defy Yevon is a major step in their growth. They go from pilgrims to rebels. Gagazet is a spiritual climb that tests their will.

In this chapterIn ruined Zanarkand, the party meets Jecht's spirit and learns that Tidus is a dream of the fayth.

In the ruins of Zanarkand the party learns that Tidus is a dream created by the fayth, the spirits of ancient people. Seymour is defeated again, and the party fights Sin from inside. They destroy Yu Yevon, the summoner who became the parasite of Sin. Without him, the fayth lose their reason to dream, and Tidus fades away.

The ending is among the most moving in gaming. Tidus's disappearance is both sad and meaningful, since his dream saved a world. Yu Yevon's story is a tragedy of grief: a summoner who tried to save his city by turning it into a monster. Yuna's speech at the end shows that she has become a leader. She will rebuild Spira.