From the laughter of children at play to the quiet whispers of bedtime prayers. One ancient author declared, Music is a part of us, and either ennobles or degrades our behavior. Even the atheistic philosopher Nietzsche said that without music life would be a mistake. Some people just go through the motions of singing but never focus on what they are singing. Others focus more attention on what is going on around them rather than focusing upon Christ.
Some people only sing if they know the song.
That is a command from God. God wants us to join together as a body of believers to sing and to worship Him. We are to sing joyfully . We are to be exuberant. We are to be enthusiastic.