In the model of church I read in the New Testament, particularly 1 Corinthians, when the believers gather, a few bring something – not by design of man, but by movement of God: a word, a prophecy (directing the people to a truth they need to hear), an edification, a testimony, a song. In the New Testament, I believe there were no worship leaders preparing several songs for their congregation to sing. Our churches today put the pressure on these men to open the door to worship, to lay out the path and charge ahead, teaching us to follow. At my church there is a stage, and those on it perform – whether performing a duty or a concert, they are not “one of us.”
If a church meeting was participatory, those who brought songs to sing would have reasons. The song would express not necessarily what we should feel or believe, but what we do believe, or do want to feel. If a song was less relevant to me, I could sing it because I knew it was relevant to my brother or sister. The singing would draw us together, and edify each other.
You run into practical problems. How do people know the lyrics? What about the tune? Do we have a pianist? If it’s a new song, how do we learn? These aren’t really problems. For centuries there have been folk songs, these melodies and lyrics rarely written, seldom studied, and almost universally known. If you don’t know it the first time, maybe you will learn after a few times. We carry on this custom in the practice of Christmas caroling. No instrument. A leader or not.