In a Prison of Peace and Regret

In a Prison of Peace and Regret (called Cage of Remorse and Relief on the Revival disc, sometimes unofficially referred to as Ship Of Regret And Sleep) is Disc 2, Track 1 on the Xenogears Original Soundtrack and track 27 on the Xenogears Original Soundtrack Revival Disc -the first and the last-. A vocal remix of the track, The End of Childhood (Revival Version), was made for the Revival disc, and was also performed at the Xenogears 20th Anniversary Concert -The Beginning and the End- and is the 14th track on the associated Blu-Ray disc.

It plays as the area music in the Ethos Headquarters, and in all cutscenes when the party enters there for the first time. It also plays in the following cutscenes:
 * The party asks Billy if the Ethos can treat the unconscious Fei.
 * The Shevat officials decide to freeze Fei in carbonite.
 * Ramsus attacks Nisan and Elly, looking for Fei.
 * Elly fights Krelian's guard at Golgoda.
 * Citan narrates the rise of Merkava and the Seraph Angels.
 * Krelian tells the party of his era how Sophia was the only one unafraid of him (flashback).
 * Lacan and Sophia tell each other their feelings in the hospital (flashback).
 * Krelian resolves to create God with his own hands (flashback).