懺悔
repent of one’s sins;atone for sb’s sins;express penitence (or be penitent)for one’s past actions;display (or show,express)remorse for one’s crimes;confess one’s sins
他們相信，不純潔的靈魂將在煉獄里～自己的罪過。They believe that impure souls may suffer and repent sins in Purgatory.