As for singing hymns and confessing, it is a ritual in the church, which can help people better understand religious beliefs and express their awe and gratitude to the gods. When singing hymns, people can feel the atmosphere of religious culture and immerse themselves in the charm of music and poetry. In repentance, people can better reflect on their actions and thoughts, realize their mistakes and shortcomings, and thus better correct their actions and thoughts.
In short, the church is a place full of religious beliefs and cultural atmosphere. Singing hymns and confessing are a kind of ceremony in the church, which can help people better understand religious beliefs and express their awe and gratitude to the gods.