I saw a person preaching on an elevated pulpit above the congregation.

The pulpit then lowered and the preacher was drawn into the congregation. Then like keys being played on a piano, the people were elevated above the congregation, sometimes one, sometime ten, all different people at different times. It was as if God was conducting and playing the body of Christ for His glory. Each person was needed and used at a different point like keys being played on a piano.

From him the whole body, joined and held together by every supporting ligament, grows and builds itself up in love, as each part does its work. 

Ephesians 4:16