1, "What song to sing under what circumstances" is a chanting poem of the church.
2. The lyrics are like this: Be happy when singing in any environment. Cheer up, Mg, retreat and sing a hymn happily. Sing a song of praise happily. With the environment, don't back down. Trying to be true and false makes you and me. Look at yourself, don't look at other people's mistakes, gossip and offend the Lord, how can you get into heaven?